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YFZ 450r Engine Mods

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  #1  
Old 12-03-2009, 06:30 PM
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Default YFZ 450r Engine Mods

hey guys i was wondering if any one out there has any more ideas to get more power out of my motor I already have the gytr air filter gytr full exhaust gytr cams a port and polished head and a 13.2 gytr high compression piston and of course a power commander 3. now i have heard of people messing with the throttle body and was wondering more about that process and horsepower gains open to any suggestions thanks
 
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Old 12-13-2009, 08:41 PM
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they are probally porting the throttle bodies. but i try to stay away from EFI atvs. as far as more power you have covered intake,exhaust and compression so you figure spark and timing are next.
 
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Old 01-06-2010, 06:03 PM
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yeah you could look at advacing the timming but you have to be very carefull and better spark will help too.. i agree with trx1000
 
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Old 01-06-2010, 07:26 PM
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you didnt mention running race gas in the list....but with that compression you better be! anyway i cant belive i didnt mention this befor but BORE AND STROKE, over sized valves(if possible), open air box and race carb and of course an ignition box. im sure there is alot more you can do it all depends on the budget(if there is one) lol
 
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Old 01-06-2010, 08:37 PM
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well the carb is out of the question cuz i got fuel injection i could get an air box my stock one is kind of on the restrictive side but i dont know if the gains would be worth it im not sure what an aftermarket ignition would help ive never really looked into it does any one have info on that?
 
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Old 01-07-2010, 09:00 AM
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if you run out of power options just try to look at loosing weight on it...use some carbon fiber stuff..
 
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Old 01-08-2010, 06:17 PM
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the aftermarket ignition box will have different timing curves for better performance. nd YES the open air box will make a BIG difference. as long as you dont max out the PCIII then you will notice a difference. i and i agree with katoom125...lol lose weight off that thing.
 
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Old 01-21-2010, 09:15 PM
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any updates?
 
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Old 01-23-2010, 11:15 AM
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Running w/o the air box mods could be an indication that the GYTR stuff may be mild.
Most ported/cammed machines will not run w/o more air flow.
More flow~~more go! LOL
Anyways,,ya,,any updates?
 
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Old 01-26-2010, 05:39 PM
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gytr mods are not mild because im only 2 levels away from being maxed out on the power commander and it was on the highest map to begin with the billet adaptor helped the airbox and i run with no lid. and the bike was sniffed so it is running spot on. im not sure which ignition system to go with and i would like to find a dyno near the lincoln nebraska area to put my quad on and get some horsepower numbers for you guys and myself
 


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