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Stock class allows up to 850cc if you read the rule book from front to back however you would not be allowed to run a 760 cylinder you could bore it to that size but thats all

i have seen alot of racers lost because of the r&d dry pipe they tend to fall apart on the coupler i have never owned one myself for this reason

yeah the same name is important got to do that

yeah i have had a heap of type 9 pipes they are awesome and in my mind the best dry pipe you can buy its hard to get the throttle response of a b-pipe but you can get them close

hp is a equation worked out by using rpm and torque as the engine goes past its point of max torque it reduces rpm rises but as torque goes down it overtakes the rate of rpm increase and hp drops to get a high rpm high hp engine you have port it accordinly this will mean you lose low end

the dry pipes are grunt for low end power in my experience however its the throtle response thats harder to get the instant brap when you hit say half throttle but if you give it everything of idle then the low end is awesome i think that people get confused betwene low end hp and...

looks awesome yeah 35 will be great and pull it back to about 17 at 7000 start pulling out at 4500

we must be looking at different things i am looking at a casting mark they all have

that crack in the front is a casting mark dont worry about it

no dont do that it will chew stuff up with out the front cover to support it but find out what your base timing you may be able to smooth the power curve out with more timing

is this with the total loss in it ? and what base timing are you using on the ski

there is a large chunk missing fromthe cases and its not helping support the cylinder how did this thing go on the top end as in like what rpm does it pull

can we see down the intake on the cases please

if you saw my cylinder you would see alot of stuff like that in it Mine more radical in some areas and less in others ie i have a whole lot more support on my port i liek the way he has tried to give more transfer port volume but i think its lost a bit to much piston support

They knew what they were doing some of its a bit radical in the sleeve cutting down they cut alot further than i would have cut

you can pm me like you did hahaha ok that is an early mod chamber for a 750 and yes at that time it did go straight out the ack and it was loud loud loud i tell you we then put a 18 degree bend at the end of the pipe and took it up to an hx water box up the front and then back down...

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Big advance allows for big jets and big hit hahaha 34 with that slope gives you 31 at 5000 rpm as a matter of interest

i run 34 degrees with it pulling back sharply from 4500 on to 17 at 7200 works well for me

Hopefully they do some upgrades on it i went to our local ski wrecker and saw six of these engines with broken and holed blocks they welded them up but heck i am not sure i want to be doing this to my new superjet