guys this summer i want to have a fast tb so im going to tear down the tb this weekend and was wondering how hard it was to take off the cyclider/head?? and what all stuff you got to do and watch for?? b/c i have a friend at a motor shop thats going to do it for free
he is going to take 25 thousanths off and port it. how many hp will this bring??
what color clutch spring would be the best?? and the last Q is would a 150 main jet be ok??



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1999 250 trail blazer
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k&n filter DG exhaust for now
just to make it a lil lounder
titan 489 xts on the back
maxxis razors on the front
full skid plate,bash gaurd
rebuilt trans,D.I.D chain
pro amor belt,scott grips
the newer model tie rod ends
12 t front 36 t back sprokets
neon shifter ****, pro burner lights
stronger back caliper holder i made at a friends shop
cut front fenders with the floor boards removed
makin aluminum dimond plate ones

 

jsut remove your plastics, gastank, all filter stuff, adn maybe clutch cover. take your time it was fairly easy i did it myself wit little help to remove cylinder frome case.

 

sounds like a good plan to me, I have recently heard someone else say .0025 taking off. I have always heard/done 20,40,60,80, and big bore. I guess maybe it doesn't matter.

 

how long did it take you?? and i never tore a polaris engine apart (( all one piece cyclider and head )) so once u get everthing loosen to take it off just pull up on the jug until the piston comes out?

 

I usually take the head off, and then yeah pull the jug off and then your done. I could pull the jug pretty fast, I want to say I could be all done in less than 45 minutes. Putting back together takes a little more time, make sure that you take your time and do everything the right way.

 

well brad im getting it milled not bored ( milled--- taking a head and shaving some off in thousanths when u do this there is less space bewteen the piston and the head so there will be more compression--better throttle respone and better get up and go power) getting its bored is a totall differnt thing thats where u make the cyclider hole bigger usually done by 20 thousanths and that adds torque

 

the head and jug is all one piece so thats why im not sure upon how hard it was to take it off
but im going to gie it a shot i know that when your getting it milled from a previous thread that you dont need to jet but im not usre about porting so would a 150 still be ok or do i need to go up?

 

yeah sorry, i guess i must have read something wrong.

 

maybe go to a 155 because i run a 160 wit porting and .020 milled off the head.