170cc Athena Kit wont rev Past 9500RPM
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HI Chaps,
Advice on my predicement please,
Built a 2003 DT125R last year, with an athena 170cc kit and Full athena exhaust.. life gets in the way and its only this year iv got it out and ran it in, this is a full nut and bolt rebuild, new crank and internals etc..
specs 2003 DT125R 3RM with a 3RM-20 CDI, Athena 170cc Kit Full athena Exhaust, standard 28MM Carby with 290 Main and 25 Pilot. Inlet reeds are carbon fibre Yambits Jobby.
under load or with no load it will not rev past 9500rpm like its hitting a rpm govener like a chainsaw....
iv upjetted and down jetted 270,280,290,300,310,320,330,340 all the same blocked off powerjet and with powerjet etc...
powervalve is visually aligned up the exhaust port and functioning, but have all so tryed pinning it open, visually confirmed. same thing....
The Baiscs, new plug, new ht lead,coil and cap, jets as above, snorkle in snorkle off, powervalve pinned and with YPVS. Reed switch behind clocks is out and tucked away out the housing.
my only other thought is to reduce the plug Gap, but seeing if anyone else has seen this or had exprence with the 170 kit
any advice aprecated, Cheers
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