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  Topic Review (Newest First)
11-29-2019 12:38 PM
MrKitty i have my bike geared to go right to 35 this way it has awsome passing power 🙂
11-28-2019 03:02 PM
CAM2
Re: New Here (GRC-RSR)

Quote:
Originally Posted by Eunos View Post
New paint. Looks like its running pretty well! A little slower than I thought - ~35mph. The engine must be tired because it seems like its getting fuel fine.
My Blata 2.5 did 35mph.....Not blazingly fast but it got there........Id say unless its geared abnormally high like in the 11:1-13:1 ratio range it should be hitting north of 40mph with a 6.2 case...My Polini with 4.2 case hit 40mph before mods and 8tth pinion...

Whats your squish setting?

Whats the compression number...?

When was the last time you checked the reeds?

When did you perform your last leakdown test?

What size and brand carb do you have on it..?

Pull the sparkplug and post a pic of it..Your jetting could be off too......

All these are key variables to keeping tabs on the current state of your engine to make sure its with-in specs to deliver proper performance...

Good Luck
11-28-2019 01:00 PM
MrKitty but how fast can it get up to that 35 thats what its about its not about top speed with these parking lot racers
11-27-2019 10:01 AM
Chrisi
Quote:
Originally Posted by Eunos View Post
New paint. Looks like its running pretty well! A little slower than I thought - ~35mph. The engine must be tired because it seems like its getting fuel fine.
35mph is OK for a Polini 6.2 engine, it's also depends on the gearing.
Bad news there will not fit any newer footpegsupport and rsr footpegsupport is no more available.
11-27-2019 09:20 AM
Eunos
Re: New Here (GRC-RSR)

New paint. Looks like its running pretty well! A little slower than I thought - ~35mph. The engine must be tired because it seems like its getting fuel fine.
11-23-2019 12:56 PM
EPR
Re: New Here (GRC-RSR)

All my euro pipes the head pipe and rear muffler is held on by springs. There are kits with springs and the U clips that get welded to the OD of the pipe for the springs to attach.
11-22-2019 09:11 AM
Eunos
Re: New Here (GRC-RSR)

looks like the cap is completely missing. I think i will try to make my own cap with a large washer. Probably won't seal well, but its the best idea I've got.
11-21-2019 03:38 PM
Eunos
Re: New Here (GRC-RSR)

Quote:
Originally Posted by Chrisi View Post
Muffler is OK, looks like a older proma muffler, the endcap should be presst inside or is it completely open at the end?
ill take some more photos. I think it might be completely missing, the can slides off.
11-21-2019 03:30 PM
Chrisi Muffler is OK, looks like a older proma muffler, the endcap should be presst inside or is it completely open at the end?
11-21-2019 03:23 PM
EPR
Re: New Here (GRC-RSR)

I would first look for a OEM body panel, its only one part. When I got my GRC GP I could have gone to Europe and bought all new body work, that's only primer, no paint. Over $700 total, more than the bike is worth, lol. A new exhaust is like $400 w/ muffler. The pipe is around 1/2" OD, there are all kinds of after market mufflers or glass pack for under $50.
RC cars & truck use a small muffler for $20 attaches w/a rubber hose to your pipe end.
11-21-2019 03:01 PM
Eunos
Re: New Here (GRC-RSR)

Quote:
Originally Posted by EPR View Post
My GRC-GP avatar bike had no body work when I got it, I put a new full body set for an MT-A2 Cag, was $ 80 then, but they are asking a lot more now. I got mine from eBay seller morethenhundreds, (MBPN, mini bike parts now, or MBPN.com. Chrisi, is the best supplier for Euro parts for us right now, I just got some parts this week, he is in Austria, my wife has friends there, lol. He is also a Racer I believe.
Yeah, I have heard the GRC-RR body works with the RSR. I might try something like that. The unfortunate part is I'm only missing a bottom starter side faring. The rest of the body, I am repairing on my own.

Quote:
Originally Posted by Chrisi View Post
I'll have the cover for the waterpump o ring on stock. And when you give me some measurements I will look if there will fit a footpeg support from a newer model.
Hey Chrisi - thanks for all the parts you have been sending me! I had the water pump pully cover and o-ring removed for the photo.

I have attached a photo of the footpeg.

A-B ~ 51mm center
B-C ~78mm center
A-C ~100mm center

Does anyone have any advice on my muffler? Looks like I'm missing the end cap. Should i look for an end-cap or a whole new muffler?

Also - anyone have a stand for sale in the US?
11-20-2019 03:08 PM
Chrisi
Quote:
Originally Posted by Eunos View Post
After a bit of tinkering with the starter and water pump, I was finally able to get the bike running. Thanks for all the help fellas!

The only thing I'm missing is the starter side foot bracket (impossible to find apparently) and the starter side bottom ferring. Any tips on where I might be able to source those?
I'll have the cover for the waterpump o ring on stock. And when you give me some measurements I will look if there will fit a footpeg support from a newer model.
11-20-2019 02:37 PM
EPR
Re: New Here (GRC-RSR)

My GRC-GP avatar bike had no body work when I got it, I put a new full body set for an MT-A2 Cag, was $ 80 then, but they are asking a lot more now. I got mine from eBay seller morethenhundreds, (MBPN, mini bike parts now, or MBPN.com. Chrisi, is the best supplier for Euro parts for us right now, I just got some parts this week, he is in Austria, my wife has friends there, lol. He is also a Racer I believe.
11-19-2019 12:59 PM
Eunos After a bit of tinkering with the starter and water pump, I was finally able to get the bike running. Thanks for all the help fellas!

The only thing I'm missing is the starter side foot bracket (impossible to find apparently) and the starter side bottom ferring. Any tips on where I might be able to source those?
10-21-2019 02:04 PM
EPR
Re: New Here (GRC-RSR)

I would not try to start it with a drill, to many things can go wrong and Euro parts are expensive, $125 for a flywheel etc.
10-20-2019 02:59 AM
Eunos
Re: New Here (GRC-RSR)

Attachment 149907

Attachment 149909

Attachment 149911

Plastic welded the cracks in the tank then hit it with some marine epoxy.

Rebuilt the carb and took a look in the cylinder. It's ready to try to start.. just waiting on the pull start to come in.. I might try a drill start to see if it will run.
10-18-2019 07:57 PM
CAM2
Re: New Here (GRC-RSR)

Quote:
Originally Posted by Chrisi View Post
Polini explosi shows NGK BR9EG or BR10EG and Champion N2C or C55

Yep you are correct and FYI if you cross referrence what the Champion N2C crosses over to in NGK and you'll see that the N2C has a broad range of #'s [151]that cross references with that single sparkplug and NGK B9ES is one of them.......

As far as the other plug [C55] I looked in my book and I use the NGK B6HS in my 910 Polini with 4.2 cases….

For the C55 cross Ive used the NGK B10EP from whats written dwn.....….I used to get those for a buck each at my local autoparts store...LOL

https://www.sparkplug-crossreference...t/CHAMP_PN/N2C

The R after B in BR10EG means its a resistor sparkplug...…….

Unless youre running sensitive equipment on a racing machine its moot to use a resistor sparkplug...…...

If you are looking for performance you want to use non-resistor spark plugs.

A resistor is exactly what the word implies. When the spark crosses the point of resistance some of the spark energy is lost.

Non-resistor spark plugs deliver a more powerful spark.
10-17-2019 09:30 PM
EPR
Re: New Here (GRC-RSR)

Polini spark plug is a little shorter than my C1 or BZM engines.
10-17-2019 01:44 AM
Chrisi Polini explosi shows NGK BR9EG or BR10EG and Champion N2C or C55
10-16-2019 09:59 PM
CAM2
Re: New Here (GRC-RSR)

Quote:
Originally Posted by Eunos View Post
You guys really rock - thanks for the answers as im trying to get this thing rebuilt.

Can you guys confirm plug sizes for Polini?

NGK (3830) BR10EG
NGK (3230) BR9EG

These seem a bit long, don't feel right.
I use NGK B6HS and B9ES for the 6.2hp Polini cases..............
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