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post #1 of 99 (permalink) Old 03-01-2017 Thread Starter
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K-ray's rides

This will be my thread. I'm done with the c1 and will use this for my next few bikes. Currently working on a blue banshee.

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post #2 of 99 (permalink) Old 03-02-2017 Thread Starter
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Re: K-ray's rides

EPR, I'm using my 19mm delrep that I got for my c1. The banshee came with a main hey of 2.00mm way to big. Abs I didn't have a 100 with the correct thread size for the stock carb. But I did for the 19mm so I slapped that puppy on and it drained a lot of gas haha. I need a petcock before I get it working again. I haven't tried the carb in the upper rpm's yet so I'm not completely sure on the jetting but we'll see.

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post #3 of 99 (permalink) Old 03-03-2017
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Re: K-ray's rides

Thats a pretty clean looking bike...Hard to beleive it didnt run good as it was already setup and yes an in-line shutoff of a must have,,,I get 1/4" Stens brand shutoffs at my local True-Value and Ace Hardware stores.........

Good Luck with it.........
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post #4 of 99 (permalink) Old 03-03-2017 Thread Starter
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Re: K-ray's rides

It's a very clean bike. I had read about the main jet being way to big in some bikes straight from the factory and mine happened to be ones of those. It says 200 on it and its huge.

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post #5 of 99 (permalink) Old 03-03-2017
Re: K-ray's rides

Very Clean for around a 2006 Banshee Sho, should have a date on it somewhere.

Empty Pockets Racing: The difficult we do, the impossible takes longer.....
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post #6 of 99 (permalink) Old 03-04-2017 Thread Starter
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Re: K-ray's rides

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Very Clean for around a 2006 Banshee Sho, should have a date on it somewhere.
I'll look. The plastics aren't as clean though haha.

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post #7 of 99 (permalink) Old 03-05-2017 Thread Starter
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Re: K-ray's rides

Weekend update. Got her running again, no leakage. I even rode it a little bit. Really bad flatspot. Never quite hit the power band, but didn't have enough room to, so maybe next time. I had randomly shut off on me so I let it cool and it fired back up. This over heat could be one of 2 things wrong.
1. typical banshee coil
2. flawed aligning of coolant hoses.

I had seen an article about how the stock coolant hose alignment was backwards, the hot water goes straight down into the exit nozzle without really going through the rest of the radiator. I checked their hypothesis and sure enough the two hose inlets on the right side of the radiator were hot (the connecting hoses to the motor) while the 2 on the left that lead up to the bottle were cool. I switched the bottom connections and we'll see how that affects the performance. I also, felt the rear sprocket was misaligned so I turned that around and that sent me on to an adventure of getting the rear wheel back on. What a mess! I'm going to do some tweaking to make sure it goes on easy and spins better. I think the wrong part of the wheel bearings are being hugged causing unnecessary friction. Also, the spacers are real wide, I feel I have to flex the swing arm apart to get it to fit. Not fun.

To be clear with what I want for this bike. I already have my racing banshee RSR, this bike is more for fun and reliability. I don't want to worry to much about power output but I do want this bike to be reliable. I want everything to work as it should rather then increase power. Which would include fixing the flatspot in the powerband to get better handling. This bike will be for my friends to use when we go to the parking lot. I plan on getting the ADA racing head to lower the squish cause I have no way to mill the head down. I also am going to get a DM seat fairing for it because it so so sexy haha. I found one for cheap over in Italy. This will be a fun backup/begginer/reliable bike.

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post #8 of 99 (permalink) Old 03-05-2017
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Re: K-ray's rides

Sounds good Kray. I had a similar problem with my cag. I had to get two people to slightly pull the swing arm apart to get the wheel to fit. As for that flatspot in the power I can't help. :/ Good luck.

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post #9 of 99 (permalink) Old 03-05-2017 Thread Starter
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Re: K-ray's rides

Haha, I got the flatspot covered it just takes time and money. The ada racing head will help a lot and modding the pipe will help too. I just don't have a way to mod the pipe here.

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Re: K-ray's rides

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Haha, I got the flatspot covered it just takes time and money. The ada racing head will help a lot and modding the pipe will help too. I just don't have a way to mod the pipe here.

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First off Ive had alot of ADA Racing products and so far only the 31mm stroker crank is the only thing that works like it should,,,,everything from the 15:1 Alky headkit to 4 petal reedblock needed to be modded to work right....

Second thing is you need to get to know your bike alot better.... I also want to touch upon is youre spending lots of loot of pocketbikes and nothing at tools.............You need tools....No two ifs ands or buts about it....

You need the proper tools like compression tester,digital caliper,mechanics toolset,,taps w/dies,,bolt extractor set,IR heat detector gun....These tools can transfer over into other realms in the auto industry aswell and are free to rent from major league auto parts chain stores.............

You need to get to know key points about your bike......Flatspots in power are dictated mainly to tuning............

Compression ratio is needed to determine fuel octane level and dictate the heatrange sparkplug to use

Squish calculation.........

Leakdown test...........

Carb setup type,,,the atomizer tube plays an important role,,,almost as important as picking the correct jetting........

Replace the reeds....They may appear to look good but might of lost its spring...

Sparkplug gap is important too..........sometimes the stock gap isnt good enough,,,,tighter gap advances the spark and opening the gap retards spark,,,compression numbers dictates gap aswell...

Home Depot/Lowes sells Husqvarna brand 95 octane fuel non ethanol blended to 50:1 with synthetic blend oil in a can on the shelf.......Thats what you should be using in the banshee..That or VP 98 octane race gas...

Also dont expect high screaming revs out of it either..Theyre the bigblocks of Euro engines....Theyre 100% torque monsters like the CR500...........

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post #11 of 99 (permalink) Old 03-06-2017 Thread Starter
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Re: K-ray's rides

You're right. I was relying a lot on what previous people have done and taken their advice and moved from there. I do need more tools. I guess I'm hesitant because of price and space. I do have room for more tools but not much. I can't have more then 2 bikes at my place. I do all my work in our second bedroom in our apt. I have a tarp laid down to keep it clean. But I do need more tools. I was put off from the compression kit I got from harbor freight but it was bad quality. I'll slow down with this bike and do it right. Thanks Cam.

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post #12 of 99 (permalink) Old 03-06-2017 Thread Starter
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Re: K-ray's rides

tool check. I've got a good mechanics tool set, digital calipers, dremel with loads of bits and a drill gun. I guess my next tool should be a compression kit. What do you mean bolt extraction kit, like an easy out kit?

Went to start her today. Wouldn't, exhaust smelt like raw gas, and I found a puddle of gas in the exhaust header. Why does this 19mm carb do this? I've bent the float arms not sure if I should do that more. Any way I simply dumped that out, and it fired right up.

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post #13 of 99 (permalink) Old 03-09-2017 Thread Starter
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Re: K-ray's rides

Out of curiosity, how do you think a 39cc w/c polini rep head would be on banshee case and pipe?

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Re: K-ray's rides

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tool check. I've got a good mechanics tool set, digital calipers, dremel with loads of bits and a drill gun. I guess my next tool should be a compression kit. What do you mean bolt extraction kit, like an easy out kit?

Went to start her today. Wouldn't, exhaust smelt like raw gas, and I found a puddle of gas in the exhaust header. Why does this 19mm carb do this? I've bent the float arms not sure if I should do that more. Any way I simply dumped that out, and it fired right up.

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The reason why you get gas in the pipe is because either your float isnt putting enough pressure to seal the needle to the seat,, theres a good possibility your tank builds up pressure while it sits or the rubber tip on the float needle gets malformed from being highly reactive to ethanol.......You should replace the needle with a true DelLortto needle that has a viton tip preferrably..

Did you get the fuel shutoff yet?

Before I bring my Polini in the house I close the petcock and run the engine until it stalls....Theres still a very tiny bit of gas n oil mix in the bowl but not enough to spill..........

Bolt extractor is indeed an easy out.....I also forgot to mention tap n die kit too..........

Last edited by CAM2; 03-12-2017 at 12:27 PM.
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post #15 of 99 (permalink) Old 03-12-2017 Thread Starter
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Re: K-ray's rides

Yea, I got the fuel shut off. I do the same thing and run the bowl dry. I took the carb apart and tested what I could till I felt confident it would over flow. I adjusted the floats in various positions and ran water through it to test it too not make a gassy mess. I ended up bending the floats to their original position and it worked. I think the floats were getting stuck on the bowl walls. Haven't tested it on the bike yet though.

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Re: K-ray's rides

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You're right. I was relying a lot on what previous people have done and taken their advice and moved from there. I do need more tools. I guess I'm hesitant because of price and space. I do have room for more tools but not much. I can't have more then 2 bikes at my place. I do all my work in our second bedroom in our apt. I have a tarp laid down to keep it clean. But I do need more tools. I was put off from the compression kit I got from harbor freight but it was bad quality. I'll slow down with this bike and do it right. Thanks Cam.

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There are so many places that offer great online deals for pretty reliable tools....

In my old 10x15 hobbyroom I had it setup like a small garage with mechanics toolboxes etc....When I got the house I kept the room as-is to work in...When the house sold a $20 gallon of paint and a $150.00 rug was all it took to make it look spectacular.............

In Florida when I went to college there was a rule of no working on cars n bikes in the complex parking lot.....They were townhouse style 2bdrm co-ops..

I turned the eat-in livingroom into my garage and the sitting room into the livingroom...I took the livingroom rug rolled it up and shoved it in the hallway closet and worked on the concrete floor.......

The 89 Gixxer1100 could barely fit through the front door but the amenities like a/c tv and stereo while wrenching were priceless,,,,LOL
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post #17 of 99 (permalink) Old 03-13-2017 Thread Starter
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Re: K-ray's rides

That makes me feel better haha.

Well I haven't gotten to buying a compression kit yet. But I tried something different with the carb. I put the stock carb on and I found a jet close to the proper size, .93mm probably will be too small though. It's hard to find 6mm jets. Everything is so expensive. So I'm trying this out and I'll check the plug soon. But she ran well (on the stand, too wet). Constant power till about 9000rpm and then BOOOM POWER! I didn't rev all the way but it for up to 12480rpm. The power on the pipe rpm's is a very different power then the low end, typical banshee performance. With the squish gap being 1.3mm there is some room for improvement.

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Re: K-ray's rides

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That makes me feel better haha.

Well I haven't gotten to buying a compression kit yet. But I tried something different with the carb. I put the stock carb on and I found a jet close to the proper size, .93mm probably will be too small though. It's hard to find 6mm jets. Everything is so expensive. So I'm trying this out and I'll check the plug soon. But she ran well (on the stand, too wet). Constant power till about 9000rpm and then BOOOM POWER! I didn't rev all the way but it for up to 12480rpm. The power on the pipe rpm's is a very different power then the low end, typical banshee performance. With the squish gap being 1.3mm there is some room for improvement.

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One point in my membership here Ive gotten to know alot of the Techs for a various amount of Pocketbike manufacturers both european and chinese...

Most of the Techs especially at Polini and BZM say that their engines the way their designed are supposed to run a compression ratio between 15:1 and 17:1........

The squish is set in the .030" range............0.762mm's

Theres a set minimal clutch engagement grab,reed type for the situation aswell as pipe and carb type that must be used....

I know if the engine isnt built to worthwhile specs it wont run in the fashion it should......

I know the Banshee is a chinese made rep that is designed after the GRC Moto GP Racing Pocketbike but in order to truely perform the rep engine must be blueprinted and built to exacting specs like its european predecessor..

If its not it wont be able to be tuned or ever run correctly and thats what 7/8 of the techs told me.

Heres some specs given to me.....If your engine doesnt meet the compression criteria it must be adjusted to be able to....

10+hp Water-cooled 49.3cc (40mm x 39mm bore & stroke) with compression ratio of 16.5:1 and five-port Banshee engine and piston (50cc). Dell'orto style 18.5mm carburetor and air filter with four petal reed induction into crankcase. High performance exhaust system with aluminum end can. Two shoe adjustable dry clutch with centrifugal counter weights and 80mm clutch drum 8000 rpm clutch engagement.

Alls Ill say is if you ever build one to exacting specs the one and only thing youll remember and mainly read is how many times and how extreme the compression kickback rips on your fingers......LOL

Last edited by CAM2; 03-13-2017 at 10:06 PM.
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post #19 of 99 (permalink) Old 03-13-2017 Thread Starter
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Re: K-ray's rides

That's what I have read as well. I have read the biggest factor is the squish setting. I wanted the ada racing head because it was a cheap easy way to lower the squish to the .5 range. The other issue with the bike is that the pipe isn't tuned to the engine. Extending the belly and shortening the stinger is supposed to help. But the best is to get a bzm 40cc pipe.

For this bike I don't want to make it a power house, just run well and comfortable meaning bridge the gap between the low end and the high. I will first try the squish then move from there. Still getting used to this bike though, so much rain!

Now my banshee rsr (grc rsr with banshee engine) I might be inclined to tune it correctly. Are those specs what it should be or what it is stock? I have a guy in Italy that is selling a ton of polini stuff for pretty cheap. I might put more polini parts on it. But soon I will match the ports at least. What else should be done blueprinting wise? That binge I have a modded pipe, blue polini reeds, bzm clutch arms, ada head, 19mm carb, 7/74 gearing, and it runs real good.

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Last edited by kray15; 03-13-2017 at 09:59 PM.
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post #20 of 99 (permalink) Old 03-18-2017 Thread Starter
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Re: K-ray's rides

Update:

The ada head came in. Mounting was no problem but the squish was only .88mm. I'm a little disappointed but with the right gasket I can get it before .5mm. My gasket is currently .5mm so there is room. I also need to test my bikes away from my apartment complex, the parking lot isn't sufficient. I'll try a bigger lot before I get gaskets.

Right now I'm also checking my jetting. I'm afraid the .93 main jet on my stock carb will be too small. I'm currently running it so I can check the plug.

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