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Discussion Starter · #1 ·
Does anyone know of anyone who has some kind of bigbore kit out for the honda?
 

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Manny, you came to the right place for info on this. A few people here are runnin the FST 500 kit and are happy with it. A few others are adding a 13:1 piston to that kit but havent posted results yet. other companies are NMotion, Powroll, and Sparks although Sparks hasnt released theirs yet.
 

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GT Thunder has a 520 kit for XC and that is what i am saving for.... my last race is Nov. 6 and then i will send her away after that but i wont have a report on it till next season.... :huh:

He said not much in hp ...(4 hp increase) but a TON of torque.... didnt give numbers but if Laz says A TON then there must be a BIG increase... at least 8 ft/bs.... :D
 

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Discussion Starter · #5 ·
I want hp more then torque. Do they have any like 480 stroker kits or something like that.
 

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Discussion Starter · #6 ·
Max power has a 480 bigbore kit they say it gives it 11 more hp.

Max power
TRX 450R 2004


TRX480CC TRX 450R to 480cc BIG BORE KIT 2004
(Bore 97mm).13:1 Compression Ratio

Stage one: $500.00 Uncoated piston and top end gasket kit.

Stage two: $575.00 With Xtreme piston top end gasket kit

Stage three: $750.00 Head porting, with Xtreme Piston and gasket kit
(with valves removed, valve seals not included).

Stage three: $825.00 Head porting, with Xtreme Piston and gasket kit
(with complete head, this includes new valve seals).

Stage four: $1125.00 Head porting, with Xtreme Piston and gasket kit
(must have complete head, this includes new valve seals, springs and intake / exhaust Hot Cams).


Dyno Graph shows stage 3 power curve
Red=stock 450cc / Blue=Max Power 480cc.



http://www.maxpower-engines.com/bb-atv.htm
 

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