just bought an 02 trailblazer250, am taking it apart to do some mods, it has a aftermarket pipe, how do i identify what brand it is, from riding it , i think clutch changes, the spring is red with yellow stripe, can anyone tell if this is factory stock or what it is, just took the head off to get milled, will i notice a difference or should i get some port work with it, i plan on doing away with oil injection also, does someone make a block off and different throttle cable, is there andbody who can do the whole package including, carb jetting and clutch set up, along with machine work, sorry for all the rambling, thank you

 

The spring you are talking about is an HPD mid to hi engagment spring so I would bet you have an HPD pipe.I have the same thing it was in my sons TB but it is on the bench now it engaged too hi for him.Check this out on eBay http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2454841658
I emailed him and got his TEAM clutch but he has a milled head and a trail lightend flywheel that is not on eBay.