well again lads,,wot size washers are needed to raise the carb needles,,the smallest i can get is m4 here were i am and there too big for the job and iv looked on ebay but i unsure on which ones to go for,,cheers for looking

0.5mm thickness cant remember what dia they are but their standard washers I think

give Rick Oliver a call/email and get few from him. Simple and easy man...

Or, take one out of your carbs and measure it yourself.....

needle washers 6.8mm OD 3.0mm ID X0.5 mm

cheers for the info guys

CMSMJ1 wrote:give Rick Oliver a call/email and get few from him.

They're machined too (not pressed).

What will raising the needles 0.5mm do? Thanks

No one

@ HMplant - the crack is - and please forgive me - that if you have to ask then you don't want to do it!

There are too many people drilling slides, raising needles, changing jets etc without knowing why they are doing it.

however...

The needle height has a direct relation to the richness of the midrange - as it withdraws from the main jet at throttle opening then you can imagine that it starting from a higher status will allow a richer mixture lower down the revs.

Ok thanks. I've seen this mod a few times & I just wondered if it'd cure the problem i'd posted on here earlier! Fluffy/flat spot