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mn519

250vs450 -- peg/seat/bar location same?

6 posts in this topic

Hey guys, I have a 250f and 450f both 06's. I have them set up the same with ProTaper CR High bars. Problem is I get weird blisters on the knuckles of my thumbs on the 450, and can see where they rub on the grips. In about 30 race weekends with CR Highs on the 250f I have never got blisters there, but both times racing the 450 with the same bars I have.

So is the peg/bar/seat relationship different on these bikes by possibly different clamps or stem/head location? Or is it just my riding style on the 450?

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The 250F has a smaller cockpit, and they handle differently. Have you tried using a grip donut on the throttle side? On the left grip it's not so bad 'cause the grip can flex, but on the right side the throttle housing prevents the grip from flexing where you're thumb is, so your thumb knuckles take a lot of abuse. Try grip donuts, at least on the right side(if you haven't already)!

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The 250F has a smaller cockpit, and they handle differently. Have you tried using a grip donut on the throttle side? On the left grip it's not so bad 'cause the grip can flex, but on the right side the throttle housing prevents the grip from flexing where you're thumb is, so your thumb knuckles take a lot of abuse. Try grip donuts, at least on the right side(if you haven't already)!

So the bars are farther forward on the 450? I will try some donuts and yes it is worse on the throttle side, good call! I can definately tell the 450 doesnt handle like my 250, but I will work on that as cash flow improves.

If it is the bars being farther forward on the 450, could I get different clamps or bars to move them to the location of the 250f?

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If it is the bars being farther forward on the 450, could I get different clamps or bars to move them to the location of the 250f?

You don't need to spend any money. The bar clamps on the 450 can be adjusted to have a forward or rearward (for short riders) position. They come in the forward position from the shop, have you spun them around yet? I'm only 5'7" so I have mine in the rearward position with the bars tilting back a bit too. I don't think you'd want them any farther back than that. It's probably something you'll just have to get used to. There's probably more factors that may be coming into play here too, it's a heavier and longer(wheelbase) bike with more power, making it harder to control.

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I will try some donuts and yes it is worse on the throttle side, good call!

You can also make your own by cutting up a stubby holder! If one doesn't help enough, you could try two donuts on the throttle grip and that should do the trick.

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The bar clamps on the 450 can be adjusted to have a forward or rearward (for short riders) position. They come in the forward position from the shop, have you spun them around yet?

I have left them in the stock location so far because I liked them forward on the 250f. I am just a hair under 5'7'' and I have always liked my bars high and forward, I run them at +1 forward. It seems to help me stay standing more, and get farther forward in turns.

I will try the donuts and if that doesn't work I am gonna start measuring to see exactly what is different, and if it is something I can change to make it like the 250f.

Thanks for the ideas :thumbsup:

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