Most shops require 2 setups too bore 2mm. THat doubles the boring charge. If a shop wants too do a bore job for you and does not ask for the piston, go elsewhere.

 

youll regret it later,go all out and make a drag raptor..lol

this is my third build and final i hope..

 

I'm not sure if AppRaptors or, my addons ?'s were answered. If they were i need more info.

 

1) Does anyone know anyone around the Houston area (machine shop) that is capable of performing this operation (besides the Yamaha dealership)?

2) I would like to actually talk to someone (or knows someone) who has the 100mm, S2, 11:1 setup and see how they like it. Regardless, if it is only an extra $40-60 for the machining, then might as well do it.

3) I'm going to hold off on the port and polish currently due to $$, but will I be happy with the 686, S2, 11:1 without it?

 

Someone here has to have a similar setup that can tell us some seat of the pants desciption???

Who does good porting?? And, what prices do they charge?

 

I couldn't agree more.....I will start my 3rd build within the next couple of months......granted the rod or piston don't give b4 then......

 

Well, I called the Yamaha dealership and they quoted me a price of $58 to bore the cylinder...not bad. With that, it looks as though I'm going to go with the Stage 2, 102mm, 11:1. Should be a good combo I hope. Head porting and polishing will have to wait for a while unless someone here can explain how I could do it fairly easily.

 

appraptor
Be prepared to run a minimum of Super 94 octane with that 11:1 piston.
You may need to drop to a colder plug as well to help disipate the extra heat generated by the higher compresion. I have an 11:1 in my warrior and actuall need to mix 50/50 super with VP 103 so that it does not ping.

 

Bob, I have read that the 10.75/1 JE is actually around 12/1 if one does not have the Trinity head work since they supposedly developed the 10.75/1 piston. So you feel the 12/1 JE piston actually provides less compression than the 10.75/1 (without the trinity head work)?