if you leave the stock servo system for the exhaust you should be fine it just represents about 2% of the bikes weight at 7 pounds so it make sense to remove it. also makes for a cleaner look and makes it easier to work on the bike

Thanks for answer :)

You could put a piece of pipe insulation type foam or some kinda high heat foam between the skid plate and engine, and that would most likely help that problem.

gbtayc . I have a flatlands skid plate on mine and had the same issue, big noise blowing back on you. Took it to the local body shop and had them spray the inside (side closest to the motor) with spray-on bedliner. Took all the noise away.

P Banks easy ass 13-48 is great

+sethdog1000 Happens when you go with smaller front sprocket than 13T stock.

but bigger sprocket will quietly affect on the initial pickup.

Agreed. I went to 14/50 in the sprockets. Heaps better and won't chew swing arms

they sold wr450F's for a while i think they still do. its just the matter of doing a street conversion at that point

michael cianci They do still make the wr450f but doing the street conversion is allowed in all states. A 50 state legal 450 would be the shizz!

I'm with you there buddy yamaha should put something out to contend with the Ducati and Apirillia motards

Turbo charge it then you will have the power of a big bore.

Nick Wayerski small bore engine turbos aren't very easy to tune. Let alone are they very efficient for the space and weight they use. Slapping in a 450cc would be a million times more productive.

go study gearing

whoisanthony smaller gear means harder to rotate so is meant for higher speed not acceleration, you go study gearing

Marc-Antoine Lévesque Go use google and common sense, a smaller front sprocket increases acceleration, decreases top speed.

From another post... Adding a tooth to the front does the opposite that adding a tooth to the back does. Larger sprocket at the front would decrease acceleration and increase top speed. Smaller sprocket at the front would increase acceleration and decrease top speed. Larger sprocket at the back would increase acceleration and decrease top speed. Smaller sprocket at the back would decrease acceleration and increase top speed. Take the front sprocket and divide it into the rear and that will give you the "gear" ratio. 35 / 10 = 3.5 The front sprocket turns 3.5 times every time the back turns once. Change the back sprocket to 40 and you get 4 to 1. For more acceleration you need a higher number. For more top speed lower.

Thanks man. But still dont make sense to me haha

Hahahahahaha

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