Had that exact problem, ended up being too lean on the bottom.

Yep its a lean bog, richen lsn and problem solved.

I just recently purchased the grp .21 tuned motor, what is the best pipe, I have a JP-1, an RB-2045 (AWESOME PIPE),I have 2 diffrent headers 92 mm 98 mm,
I want to get the low end run up to a triple but still have some nice top end.
any help would be appreciated.

whats the best plug to run in this engine if i don't have access to GRP plugs???

Thanks,
-DC-

OS P3 has treated me pretty good so far.

ok thank you sir...

-DC-

I like the OS P4

What kind of OS plug is that? I didn't see it here:

http://www.osengines.com/accys/glowplugs.html

GRP#4 and a 53 pipe

i stumbled across were you can get the promo kits for $309USD i just ordered one for my self at that price your crazy not to i dont know if it comes with the 2053 or the 3009 pipe PM me if you want a link

The glowplug chart you have is the US one. The OS Japan site shows P3, P4, P6, P7 and P8 in the turbo version.

If you bought it in the US or AUS it will come with the 2053 pipe with short manifold, i got mine from EU and it came with the 3009 pipe and long manifold.

At $309 it's probably coming from Hong Kong. One of those RC-Mart type places, I would assume.

So a p3 ultra hot is hotter then a p4 super hot?

P3 is their hottest.