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Smoke was being caused by one of the valve seals being bad. Anytime an engine smokes on the deceleration it's usually a valve seal. Also,adjusted the valves. Did this before the valve seals And it helped with the temperature running hot if I can remember correctly. As for the carbs I studied...

On it!!

thanks angus 67 had just actually figured it out when I see little springs and bearings mysteriously appear my first instinct is to panic lol

Still just no luck Tried syncing Tried mix screw Had the effect that messing with those things would produce,but still hanging the same issues with heat,significant smoke on the idle down. Messing w the mix screw helped w the length of the idle down though. Decided to tear down...

I prolly should do that though fredintoon Just getting really burnt on this Been at it for 2weeks At least I'm learning Thanks for the good advice

i hadnt pulled the screws at all just adjusted them not sure they need it as the carbs were really clean in the first place

Yea running air and not running it for long periods of time Im really not finding any good info on syncing carbs though.......

Thats where Im getting a little confused as well. From all the info I've gathered I'm led to believe its running lean. For instance,the heat of the engine especially the pipes which have gotten red hot at an earlier stage,the longer than normal idling down and idling down to a high idle,only...

Well I'm getting no where here. Exposed the fuel mixture screws. Messed about with them and changed back to the stock needles. Very little improvements on engine temps and that's about it Even if I get it to run rich thru adjusting the mix screw the temps are still seemingly higher than...

Very helpful fellas. Thanks to you. 5twins,I was thinking the exact same thing after trouble shooting every slot on the new needles. Gonna throw the stocks in there and take notes. Drilling out the slide lift holes won't effect the stock needles performance in any way would it? Cause that's...

You can drill it out though? Yea,I'm just experimenting with drilling the old jet to kinda give me an idea of the size I need because there's 5 sizes greater than 145 at around 8$ a set

Hey all wise in the knowledge of everything XS Me? I have an 81' xs650 engine w stock bs34 Mikuni,pods, and open pipes. I'm been relentlessly working at getting the fuel mix correct Bought a kit from mikes with new jets (145) needles,and drill bit for drilling out the slide. Runs wo...

thanks fellas

hello all wise to all things Xs650. have an 81xs650 engine that Im having all kinds of issues with. to get things started Ive noticed that under the ignition unit advance covers I have nothing resembling an ignition unit advance. Did they make these obsolete? Should I have one and has...