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Now thats a well written report

Of course lap times are alot quicker on four strokes. The bikes are newer and all the top riders are on them. Why because that was the sponsor says to do. They are working for the man as well. Four strokes have done so much damage to the sport of motocross. No one can afford to constantly fix a...

Did you end up running it ??

on the sleeve. I want to know what the piston see,s

Im getting weird numbers from what your measuing. I suspect this engine was once a stroker. It has very low transfer duration as a stock stroke engine

Thats making more sense. Ok I will run the figures again later and let you know

please recheck the figures. The figures you gave me show up at 217 exhaust and 121 transfers. Or close to it. It may have been a stroker and the pistons run out the top of the head but even then its quite high in the exhaust

Man those cases are beautiful and will run well. measure the ports from the top of the cylinder and I can give you a basic idea of what the port timing is. Dropping compression is fine you will lose power but you have to keep the squish tight. Spacing the cylinder opens up the squish and...

I had the same issue with a advent it would fire back hard on the starter. Even to the point of smashing the starter clutch. I have tried a factory fire and issues with it just not restarting and the only way to get it restart was to connect the positive and negatine together. not while...

Can you make a triple. I know you cant because it defeats the awesome transfer setup. But I can dream cant I

gp760 manifold good cheap and better than a lot of the other ones, as good as the rest. tell him you want 118 centres and that will fit all the good manifolds

Im hearing good things about the new one. Not so much on the old one. However its starting to make me think about trying the new atp epic. If it does work well its an awesome thing. I don't think it will make any more power than another programmable ignition but if it keeps going unlike most...

The 44s will make alot more torque its been proven over and over again. The taper bored 38s are not a good option on the yamaha 38s. it make them finicky to tune due to the fact that the air was never meant to flow past the jets in the way it does when you remove the boss in the carb. if you...

I was runing 150 lows on my race hx and 100 highs as a race boat. It worked well enough. The key to getting reverse jetting to work extremely well is in the timing curve. It makes them explode of the dock thats off the dock not on the dock lol ( stupid humour )

you just described a lean situation. Try even going to 125 low 110 high 20psi pop off or close to it One turn out on high and low.

i would run a 120 -125 low and a 105-110 high. bmwtech i would suspect you will lose torque when you change the jetting how you plan to

Never done it with thos carbs on a sxr, But I would be trying it if it was me

Yeah mark. I wasnt talking about you. Just the whole debate that went on and on with numerous people over a 18mth period lol. I know I finially convinced you to take the stuffers out. Some peopl still dont believe me, If groupk says it then it must be fact mentality

Whats the spec on your boat. Mark44 I think we have all been here before, maybe more than once. Reverse jetting works I wrote a big explanation as to why but I really cant be bothered writing it again search and you will find grasshopper ( now im really getting old)

As much as it pains me to say this as I know it will bring the retail price back up. The std 760 carbs are awesome and just plain work. There is nothing to be gained by running after market 44s over these carbs. 46s are better again and after that its novi all the way. Remember you have to feed...