If your cylinders are under 145psi
Order a base gasket and some rings and send your cylinder to napa for a hone and rering, l belieave you want a ring .5 over dont quote me ask ,l dont have a machine shop yet
Dude
Your
Ski should run pretty good find a after market milled head 180psi is gonna be another 3-4mph gain and big seat of the pants feel
Another thing dude l forget what prop you have ,but you should start with skat 9-17 ,them balancing and sharpening and if you feel repitching
Your ski is a...
You really wanted a ssxi or bigpin 750 they are 10-15 hp more powerful than your ss version because they have raised exhaust ports and altered timing built in
You may beable to put a ssxi cylinder on your bottom end ,but l doubt it ?
There are cart tanks , you have a kehin cdkll 38mm actuall 34mm why they do that ?
The only other carbs l would use is a 42sudco kehin or better sbn44
Your carb will need rejetting for sure
I run a pjs tru bore 38mm kehin cdkll im sure it will run to 60mph maybe 70mph
Westcoast pipe +6-8hp
Limited 24-28hp
Venture to say 16 17 18 coffman
I personally would build a custom alluminum wraped in hydroturf gas tank
Get the limited 750pipe ,port match it get a lightened flywheel from #zero
Mill the stock head at napa for 40$ bucks .25 thou should allow 89octane up...
That version of the 750 is 8hp more powerful than the 650
But a 650 with a factory pipe and sbn 44 ,is gonna outperform the 750 with any pipe other than the limted pipe
From a performance stand point westcoast is garbage im sure there's a coffman pipe that performs but would take custom...
I would try richening the topend a quarter turn left on both high speed adjustments , can you pull your plugs and post a pic?
If its worse go back to the adjustment were you were and go the other way or leaner
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