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a stock cdi advances timing with rpm a msd enhancer retards timing with rpm so yes advance the stock stator w/stock cdi about 3/16 in but when you put on a hi comp head get the enhancer

because freezing the sleeve only gets you .001 smaller and when you put it in, it starts cooling the alum cylinders really fast=shorter working time at 400* the cylinder will grow plenty, about .012 to .014 thou

just keep the sleeve at room temp...don't freeze it, you'll have less working time doing that

old msd analog tl's are for the trash bin, go with newer digital

permatex ultra black silicone works too

the results show the xscream engines owned the top 3 in both am and pro

bingo! no way you did that on the bench upsidedown

.005 interference fit is fine, heat cylinder to 375-400* for 40 mins

use a professional for machine work and port job, use the engine professional's setup to match up dome size for the porting and what fuel your running

a 701 won't even run in that hull no air

i heard main problem was weight

get ahold of john at Loki customs Westthorpe farm little Marlow Buckinghamshire SL73RQ info@lokicustoms.co.uk

IMO o-ringing a stock head is asking for failure. 2nd, even with milled heads you can't control squish clearance/msv very well when the Yamaha OEM headgasket is .052 compressed * just buy a ADA head setup for a yamaha *not based on the 760 metal headgasket*

I would confirm timing with a light afterword if your running any decent compression with modified or aftermarket head

always check your midshaft housing also...could be cracked and sucking air through through the shaft tube

Has been a long time since I did one. Take the red from the box and skip the lanyard switch in the diagram and go to the on/off switch. Yamaha lanyard is the black and white for the kill and the start is red and brown is for the start relay. Red from batt/fuse to switch red and brown to the...

I would start @.008in Just make sure you check jetting and do a break in first and up to running temp before any hard wfo running.

If it is in fact a 6mm stroker crank, the bore would be 82mm and come out to 781cc to be a legal cc limit in the 785 cc racing class. Pulling off the head would be simple to measure the bore and see if the info makes sense.

FP jetting is for stock 38mm carbs

what pistons did you buy?