[Vroomin350]

What's goin on fellas,


I have decided to tackle the task of doing some maintenance/repairs on the bike and any help would be appreciated. Thanks to Repo for helping me and Swheels and Cam2 for some threads. Never worked on an engine of any kind but its time I learn. At any time feel free to chime in and bark at me for breaking some golden rule of ancient pocket bike history or putting something in backwards marcelo

Here we go...


1. According to midsouthminimoto NGK BR6HS is the standard spark plug for the 2.5/2.6 blata. I am heading to buy one today.

Does it need be to "gapped", if so how do I do it.
Any tips for this job? Something I should be careful for etc..

2. I will be cleaning the carb, any specific fluid you guys use or regular carb cleaner from auto parts is ok? Anything I should look for when I am there?

3. I want to replace the fuel lines, does anyone know the girth of the hose I should be buying? Where might I find some locally.

4. I will be removing the gas tank and cleaning it with warm water and dish soap.

5. I will be replacing front and rear rotors, as well as pads.

6. Bike has stock filter, I want to clean or replace, what route do you suggest I look into? I don't know how to choose filters. Brand/size/etc..

7. Cushion on the seat. (did he just ask to make a pocket bike comfortable) Yes, I've considered it, this thing can be a PIA literally at times. Just wanted to see if anyone else had done something about it. The seat that it comes with is thinner than a business card.

8. The third bolt holding the engine in place is missing, not the two at the bottom of the frame, it's on the side, attaches a small arm of the frame to the clutch I believe. Anyone know the size?

Matter of fact I would like to replace all bolts, anyone know where they might sell colored ones?

9. The rear sprocket has a small bend in it. I am almost positive I DON'T have to go with blata original product here. Please chime in. Brand/size/etc..


10. Anything I do on the chain? When rolling the bike forward with my hands, at one point it's very tight and at another its normal. I am thinking that's due to #9 on this list. Also scrapes the frame at one point, here are two pictures.

11. I seem to be having a leak from the exhaust where it meets the cylinder.

Thanks for all the help in advance, I sure could use it.

 

[Vroomin350]

this is the picture of the missing bolt. It wasnt letting me add it to the previous post.

 

[CAM2]

Go to the autoparts store and get

carb cleaner

1/4" see-thru fuelline

1/4" nylon mesh hi-flow fuel filter

128pc Import car hardware kit

chain lube


Go to the mower repair shop and get an exhaust flange gasket...Say redmax ex8001 backpack blower not 39cc pocketbike....


NGK plug gap is .030"

for the rear sprocket you can use one from a cag...68 tooth is stock on a cag...74 is for tight racetracks and 60 is for topend.........

your carb is a 14/14 sha delorto,,get a v-stack/hp airfilter for it aswell as a jetpack assortment kit to rejet the carb

chain is a #25...I buy my chains in 10 ft rolls with 3 masterlinks...Its the same price as buying a single pre-made chain............

as far as the seat cushion...we have a member named Jaloos who came up with a sweet seat cushion mod...He has a thread on it....

Good Luck

 

[StrayDawg63]

You may have a Dellorto sha 14/12 on that bike for a carb if that a 2.5 or 2.6 hp. Its the 4.2 hp that have the 14/14 carb

 

[EPR]

I was looking at midsouth yesterday and they list the 2.5 w/ a 14/12 Dell.

 

[Vroomin350]

Talk about support. Thanks guys. Cam thank you very much for that detailed post, I printed it and I am taking it with me tomorrow.

EPR I looked at the wheels, thanks for the link man its exactly what I was looking for. I am sure I'll have other questions but for now I am off to a great start. I'll keep updating this thread as I go.

 

[Vroomin350]

You may have a Dellorto sha 14/12 on that bike for a carb if that a 2.5 or 2.6 hp. Its the 4.2 hp that have the 14/14 carb

Is there a way to physically confirm this?

 

[Vroomin350]

Go to the autoparts store and get


128pc Import car hardware kit

Is this a tool set? They should have it at auto parts right?

NGK plug gap is .030"

Will it come gapped or do I have to do it?

your carb is a 14/14 sha delorto,,get a v-stack/hp airfilter for it aswell as a jetpack assortment kit to rejet the carb

I hate that you guys goin out of your way to help me and I still have to ask 3 more times, very sorry what does a vstack/HP air filter look like and where can I get one? Also the jetpack assortment kit

chain is a #25...I buy my chains in 10 ft rolls with 3 masterlinks...Its the same price as buying a single pre-made chain............

I'd be willing to buy one off you, I mean if I am goin to pay for 1 what you pay for 3, I might as well give you the money, you make me one and you can keep the other two I don't mind. Regardless I am spending the money.

as far as the seat cushion...we have a member named Jaloos who came up with a sweet seat cushion mod...He has a thread on it....

Good Luck

Thanks again

 

[EPR]

Yeah, the chain thing is the way to go. Most of my bike are custom and a 144 link chain is too short, so with a roll of chain, you rap it around the gear with your rear axle & wheel where you want it, mark where they meet and cut it to size. I move my axle as far back as I can, with 3/8" left to the adjuster plate to make the wheel base longer, if you want a wheelie back move it all the way forward and lean back alittle,lol.
I grind to pins down to the plate on my 8" bench grinder but have used my 4 1/2" angle grinder too, pound the link out w/ a pin punch, your no going to use the plate so you can ruin it.
Don't think they have billet V-stack that will fit the 14/12 or 14/14mm Dell carb.
The wheels are a great deal I have 2 set and might get a 3rd,lol. It's min. $25 for each rim and tire everywhere else or $100+. The're the older thicker wide bead rims and tires, I hate the new lighter/thinner rims. I asked Randy, whats wrong, he said bad paint, so you just touch them up. There's black, red & blue.
You can get 10 wheel bearings online for $13.47 shipped, 6000 ZZ 10mm x 26mm x 8mm wide. Online at usabearingsandbelts there is greatbrearings too.

 

[Vroomin350]

1. Is this fuel filter a good choice?


http://www.scooterparts4less.com/web_gas/2Stroke_Alum_Mini_Fuel_Fiter.htm


2. Should I get this? Saw you recommended to jaloos lol

http://www.ebay.co.uk/itm/Mini-Moto...tem4cf941ea10&clk_rvr_id=413512494386&afsrc=1


3. Is this the right sprocket?

http://scooterparts4less.com/web_gas/Pocketbike_RearSprocket.htm

4. Should I stick to standard spark plug NGK BR6HS or is there an upgrade?

 

[EPR]

Forget the alum filter, too small to exspensive. The reeds are for a reverse Polini GP3 engine, and there in England & $20 S/H. The gears will work on a Cag or C1 not sure about other bikes.

 

[Vroomin350]

I am back! I know you probably dont remember who the hell I am since I only posted for about 2-3 months back at the end of last year.


CAM2, EPR if you guys remember my bike was boggin down at full acceleration, shutting off at idle and just running like crap.


Well I discovered the following that might help you guys help me diagnose what the problem is now that I am riding it much more again..




The bike runs PERFECT with the choke opened only 75% of the way, if I open it anymore than that it starts to run horrible again



Ive been riding the bike like that for about a month, I let it warm up and then ride the whole time with the choke open only 75%.. Accelaration is great, feels solid at top end and the bikes rides smooth....



What I want to know:

1.Whats the problem
2. Am I ruining anything by running the engine this way?


If I am not damagin anything, is the fix worth it?


Thanks again

 

[CAM2]

I am back! I know you probably dont remember who the hell I am since I only posted for about 2-3 months back at the end of last year.


CAM2, EPR if you guys remember my bike was boggin down at full acceleration, shutting off at idle and just running like crap.


Well I discovered the following that might help you guys help me diagnose what the problem is now that I am riding it much more again..




The bike runs PERFECT with the choke opened only 75% of the way, if I open it anymore than that it starts to run horrible again



Ive been riding the bike like that for about a month, I let it warm up and then ride the whole time with the choke open only 75%.. Accelaration is great, feels solid at top end and the bikes rides smooth....



What I want to know:

1.Whats the problem
2. Am I ruining anything by running the engine this way?


If I am not damagin anything, is the fix worth it?


Thanks again

If you have to choke off the air by 25% you either have an airleak or youre running too lean.....

 

[Vroomin350]

Could this be it?

I still havent purchased that gasket you told me about because I cant find it locally. Not too many mower repair shops in my area.

 

[EPR]

How many mm are the exhaust bolt holes apart, how big is the hole in the head, how big is the hole in exhaust flange area??

 

[CAM2]

How many mm are the exhaust bolt holes apart, how big is the hole in the head, how big is the hole in exhaust flange area??

same as a cag.............

 

[EPR]

Find a hp gasket for a Cag pipe with the round hole not the rectangle stock hole. I have one here forgot where I got it. Might have been MPR.

 

[MathieuOuellette]

Find a hp gasket for a Cag pipe with the round hole not the rectangle stock hole. I have one here forgot where I got it. Might have been MPR.

Does the circular gasket actually make a a diference?? I have a few of them, but I tend to go for the rectangular... If you explain to me why that would be sick.. :thumbsup::thumbsup: Thanks!!

 

[EPR]

Cause the exhaust pipe is round and the Cag port is square, flow out is no problem but the flow back hits a top & bottom shelf, so I round the outer part of the heads exhaust port to match the round pipe. Nice easy path both ways. With an high RPM pipe it's even more important, the piston going down sucks what ever is left in the header pipe back into the cylinder . On my more modded engines I use a PBU billet alum Torker Exh. header, with fins. It goes from a rectangle port to a round 3/4 pipe, to fit the spring held pipes with a head piece.

 

[MathieuOuellette]

Cause the exhaust pipe is round and the Cag port is square, flow out is no problem but the flow back hits a top & bottom shelf, so I round the outer part of the heads exhaust port to match the round pipe. Nice easy path both ways. With an high RPM pipe it's even more important, the piston going down sucks what ever is left in the header pipe back into the cylinder . On my more modded engines I use a PBU billet alum Torker Exh. header, with fins. It goes from a rectangle port to a round 3/4 pipe, to fit the spring held pipes with a head piece.

Thanks for the explanation EPR :thumbsup::thumbsup:. circular gaskets going on my bikes for sure. I'll probably look into the torker manifold, as that sounds like a pretty sweet addon aswell... probably wont fit on the quad motor since the pipes fitting is vry tight and adding an inch of at the flange will make it impossible for the header to fit in a way that the pipe can go onto it... but for the new cag build I have Im possibly going to order one up and test it out for myself.