chain roller

yup your gonna need to drill and tap a hole. I drilled and tapped mine right where the little circle of a weld from the rear brake rod is.

thats where i do all mine

It's a good idea to run one as the i-shock does raise the rear and the chain could rub on rear of the flywheel cove and will wear a hole right through and into the bolt. I have these as a kit, (roller, spacer, bolt) in 2 ways. If you have the ability to drill & tap a hole, or they come with a longer bolt & nut. PM me for pricing. Thanks.



Don

make sure you get the hole drilled straight into the brake rod or you will strip out the hole . do not just drill a hole in the plate and put a nut on the back this will cause a big problem the torc from the chain will tweek your frame where you mount the wheel ( even chromemoly frames) this will also cause your chain to jump and it could come off and crash into your cases causing a major headache .



PS. I change the swing arm mount on my set up and don't need a roller even with a 3 inch over swingarm . this how the the big bikes are set up

I drilled a hole just above the brake holder & bolted it on, works fine.



ct

Opps, after reading Skindoaner's post, maybe I best re-think my applaciton...



ct

Yah the washer will help but we have seen them bend with it too.



I had a customer that tweeked there frame there what we did to repair it was weld another plate over that area and beefed it up

so your saying drill the hole right into the weld circle and into the brake arm itself? Hmmm.. what size tap?

So far out of all the kits I have installed or sold, I haven't had any sort of problems with frame bending. Like Racer said, I just don't see how the chain could produce enough power to bend the frame. It's mounted under the swingarm and the chain on that side has no tension under power. Maybe if someone were to mount a roller on the TOP side of the swingarm under the chain, that would most definitely cause problems.



And to enter Sydeshow's question, you have to drill with an "F" or 6.5mm drill and tap 5/16-18. Unless the bolt is metric, then drill 17/64 and tap with an 8mm x 1.25 tap. Good luck!



Don

chain rollers

If your having trouble installing or knowing which one to buy. Call Brian at PRC. He'll be happy to help you out. You can do it alot cheaper than what some people are selling them for.

Jim

www.precision-racing-components.com Paid advertiser and engine builders for over 30 years.

I don't know what to say guys it happens and quite often at that .



There is force on the chain roller when ever you apply your brakes or down shift or just let off the gas . the chain does have weight but this not the problem it is reverse tension off the output shaft that causes this . all the frames other than Fast 50's have had this problem with bending .



My personal oppinion is redesign the pivot point so you don't need a stupid chain roller . you don't see the on a big bike so why our beloved mini's .

are they using a specail super duper metal i dont know about? I thought 4130 cromoly was 4130 cromoly

no commit

SkinDonor said:

you don't see the on a big bike so why our beloved mini's .

Click to expand...

Every single big bike has a chain roller. Do you think that they started making them for 50's? No, its the bigbike companies that are making them, which the 50 companys adapted to fit the little bikes.

Yah you are right my bad



But my idea does work