Speedzilla Motorcycle Message Forums - View Single Post - 1990 750 Sport - questions on custom carb setup
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Old 09-19-2007, 03:25 AM
donzielke donzielke is offline
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Join Date: Nov 2006
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Quote:
Originally Posted by nydesmo View Post
Don,

Does the bike have the stock 'carb' or aftermarket 'carbs'?

The original Weber is the first thing people remove from this bike and replace with (2) single carbs. The Weber was made for a 1200cc Fiat and is known to have a flat spot in the 3 - 4,000 rpm range. My guess is you still have that (1) carb.

Replace it with a set of 36mm Dellorto's and the bike will run much better.

Sounds like your bike has been sitting for a while.

Regarding the brakes ... replace the fluid and clean out the caliper and lines, an easy thing to do. Replacing the lines with braided always helps the feel, as does new pads.

The Clutch ... again if the bike has been sitting, it could have air in the system or fuild could be low. The system could be leaking and that could be from something being dryed out. This happened to me at the resevor on my 750 Sport.

Good luck,
Greg
Hi Greg -

Thanks for the note! Yes, the bike sat for over a year before I bought it.

The bike has an aftermarket set of carbs. They are 38mm though, too big according to my mechanic. I did pick up some new brake pads and fluid, and I'm looking for new stainless lines.

The clutch fluid has been changed. Mechanic thinks I've either got a warped clutch disk or the big Harley grips (see pic above... came on the bike) are interfering with the lever. I bought some new grips to put on, just need to cut the old ones off.

I read somewhere that the clutch slaves were prone to leakage, did you ever have to replace yours?

Thanks again for your help,
Don
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