Yamaha TRX850 Enthusiasts Forum

So, today i went for a "are u kidding me" ride with the last setup i wanted tested.
60mm billet stacks into Keihin 41´s going into the TDM900 with wiseco high comp pistons...head job and tornado cams exiting in the akra with a 60mm MTC can. The akras stubs has been "ported" to match the head jobbie.

Think i´ve hit the sweetspot, takes off like never before and at 5k revs it flies up in the air...didn´t even had the chance to react so the tank slapped me in the chest area. In an uphill i did the longest wheelie so far.
Today was a good run!

I have the projection components big bore 2-1 (with 60mm stainless can) on sale in sweden for a week or so before offering it international.

cheers

High comp pistons in the stock bores KW?
So, what can you ascertain has made the biggest difference in all the set-up`s you`ve tried?
Have you had dyno runs done in this guise?
So many questions, so many expected answers!

1. Yes
2. It will always be the carbs
3. It´s been dynoed with akra and blue plastic stacks
4. No, but i´m pretty sure the power delivery moved down due to these stacks...
Also, i can´t be sure mech saw i´ve ported the akra stubs to match and he might have just put them in.
Gonna do a dyno before season is over for sure!

As said, today was more fun than ever!

Mincehead wrote:High comp pistons in the stock bores KW?
So, what can you ascertain has made the biggest difference in all the set-up`s you`ve tried?
Have you had dyno runs done in this guise?
So many questions, so many expected answers!

Yes very likely the longer induction has shifted the power lower down, I found my longer inlet stubs did the same, quite nice having more power lower down.
I`ll be buying some of theose velocity stacks myself I think, ferk the expense.