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Author Topic: How to make a 2007 rm 250 less powerful for enduro? HELP  (Read 2733 times)

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Offline graysonsam94

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How to make a 2007 rm 250 less powerful for enduro? HELP
« on: September 25, 2011, 02:19:00 PM »
Hello, we have just bought our first 2 stroke motocross bike and it is for my dad. I test rode it today for him and it just feels a bit too powerful for him, he has only ever owned 1000cc road bikes but has never done off road riding. he is wanting to do enduro  and stuff like hare and hound rides and all that, what modifications would be best for the bike, it has an fmf gnarly pipe on it and a standard back. Also, i was wondering if a flywheel weight would do it anygood to ame the power. Please help. thank you :)

Offline coblefutch

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Re: How to make a 2007 rm 250 less powerful for enduro? HELP
« Reply #1 on: September 25, 2011, 02:38:54 PM »
A  flywheel wt will not reduce the power, but it will spread and smooth it out. All the power will still be there, just not all at once.
I use a 13 oz on my yz. The easiest way to reduce the power is to lower the compression and retard the timing. Some bikes you can stack 2 base gaskets between the jug and the cases to reduce the compression. retarding the timing should not be that tough do a google search for how to.
I would just put the flywheel wt on a ride it much more. Your dad will get more comfortable on it in time.

Offline TMKIWI

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Re: How to make a 2007 rm 250 less powerful for enduro? HELP
« Reply #2 on: September 25, 2011, 03:08:36 PM »
Put a 11oz flywheel weight on it & get the suspension re-valved to suit off road riding.
Thats it. Have fun.
If you don't fall off you are not going hard enough

Offline msmola2002

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Re: How to make a 2007 rm 250 less powerful for enduro? HELP
« Reply #3 on: September 25, 2011, 05:48:37 PM »
yep, soften it up and a bigarse weight

Offline SachsGS

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Re: How to make a 2007 rm 250 less powerful for enduro? HELP
« Reply #4 on: September 27, 2011, 07:01:09 AM »
Disconnect the powervalve and that RM will become very "Enduroy". ;D

Offline beaner

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Re: How to make a 2007 rm 250 less powerful for enduro? HELP
« Reply #5 on: September 27, 2011, 08:07:51 AM »
Instead of a revalve, you can always experiment with lighter suspension fluids first.
Ontario, Canada

Offline eprovenzano

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Re: How to make a 2007 rm 250 less powerful for enduro? HELP
« Reply #6 on: September 28, 2011, 05:32:08 AM »
I agree that a flywheel weight will make the bike more manageable.  Other necessary mods proper hand gaurds...  The only true adjustment would be seat time.  Its going to take a little time for his to get used to the 2 stroker.  There is no replacement for seat time.
Eric Provenzano
2019 KTM 300 XCW TPI
2000 KTM 300 EXC (Son's)
2001 KTM 380 EXC
Sold 1991 KDX 200... fun play bike
Sold 1999 KX250
Sold 1999 YZ125 (son's)
Sold 2001 Yamaha TTL 125 (son's 1st bike)
Sold but never forgotten 1974 Honda Elsinore CR250M
Sold 1974 Honda Elsinore CR125