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Thanks Rob, I was thinking that the slide needle was utilized as you described, but wanted to get some validation.

I'm helping a buddy with the stock Bing Type 53 (26mm) carbs on his '72 R50/5. We're rebuilding them and I see there is an accelerator pump as part of the main jet/mixing tube assy. I'm curious how this actually works so I can verify it's operation when re-assembled. I'm very familiar with Dellorto ...

I have a '74 R90 and recently had some oil leaks, so I went in and replaced the rear main seal, oil pump cover w/ new o-ring and trans input shaft seal. I updated the oil pump cover to the latest style with the hex bolts as recommended. I start the bike up yesterday and there's a fairly solid stream...

2004 RT, 90k miles. zero issues with the tranny, splines, clutch, etc. Still shifts like a brand new bike. I've run Amsoil synthetic since new so maybe that's helped.

LOVE 6th gear on the highway, btw.

I'll vote for a bad or leaking condenser, assuming you have the stock points and condenser ignition?

Do you know how to check a condenser with a DVM?

jimmyg

The stock R90s rear end ratio is 33/11 and matches to the stock speedo. There will be a number at the bottom of the speedo face. (1.112 is stock for the R90s with the 33/11 rear end). If you change the rear end ratio, without changing the speedo, it will be off. Some says it's always off anyway. Yea...

I guess my follow up question is, "if I wanted to get oem style solid rotors, where would you purchase from?"

thanks,

jimmyg

thanks Kurt.

What is the minimum thickness for a stock, solid brake rotor for a 1974 R90/6?

I don't see it stamped on the carrier.

thanks,

jimmyg

A little more info. I do need to get the hand lever cable adjuster as mentioned previously. But another observation when working on it again over the weekend, is that the right side caliper was moving as I applied the brakes. I deduced that the inside pad wasn't quite perfect and therefore, when pr...