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Welcome ;)

Was it a ball-ache to get the bike in to the UK?

G'day Phil,

welcome :) Hope you have fun (in a good way) with the 4DP.

Hi Markus,

For parts that are NLA from Yamaha, you can try DTR (Dennis Trollope Racing) in the UK, or Accu-Products, or Rising Sun Cycles, both in the US. I reckon your best bet (since you are in...

Also the screw-on adaptor on top of NGK plugs can loosen. I had the same problem and this was the cause.

The JM pipes look like a great option with the ability to be able to change power characteristics as you have described. Sounds like you have a lot of testing to do!
I had considered these pipes...

So, whilst trying to track down a new circlip for the water pump shaft on my 3YL, I discovered that the Yamaha part numbers appear to correspond to DIN 471 external circlip (D1400) dimensions, eg:
...

Added my 4TW4:

1RK - 000002 / 000215
2KM - 000470
3AK - 000152 / 000573
3LC - 000231 / 000728 (manual indicates 000101 is the starting S/N)
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Hi Adrian

I'm in PCRA, and running in PM 250GP. I ran PM F2 last year at the BSFOS. 3YL frame to 4TW should be fine, I guess it depends on whether any mods were done to the frame...

Not sure...

Thanks for the encouragement :D

Sounds like you have some challenges yourself! Good luck :)

Hi

I've been lurking a while, I'm in the process of stripping and rebuilding a 3YL for the International Festival of Speed in March, and I also have a 4TW4 which I raced (at what was called the...

Nice! Sending you an email