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Author Topic: YZ 250 OR RM250 (2T) as a trail bike/ enduro  (Read 14784 times)
Glennboy
Suzuki 2013 HCR
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Posts: 103


Albury Wodonga


« on: June 01, 2012, 11,50:40 AM »

As an alternative to euro 2t bikes what would a Yz250 or RM250 2 stroke motocross bike be like as a trail bike? (enduro).

I Would be willing to add a headlight, taillight for Rec rego and change the  gearing/ exhaust etc for more bottom end but what do you think.
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Dirtpilot72
Full Member 2012/2013

Posts: 613



« Reply #1 on: June 01, 2012, 12,10:07 PM »

Bad idea.
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Serge C
Full Member 2013/2014

Posts: 3011



« Reply #2 on: June 01, 2012, 12,13:27 PM »

Bad idea.

why?

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"He may look like an idiot, he may sound like an idiot, but don't let that fool you...he really is an idiot!" - Groucho Marx.
Mat R
Treasurer
Committee 2013/2014
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Posts: 1775


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« Reply #3 on: June 01, 2012, 01,05:47 PM »

Gearbox will still be shorter and close ratio, fuel tank is smaller and suspension tuned for motocross so harsher than a trail setup. If you ride hard all the time then o.k. but will be a compromise over an enduro 2T bike. Even changing the final gearing and pipe will still have less bottom end so may struggle in snotty stuff.

That said, lots like a motocrosser in the bush so why not. It would have to be cheaper than a euro 2T to make it worthwhile.
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flipper
Full Member 2012/2013

Posts: 260



« Reply #4 on: June 01, 2012, 08,42:09 PM »

Mat has brought up some good points, but (at least for the YZ) they can all be addressed if you choose to do so.

I have an enduro-ised 2T YZ250 (2008) - for me, the bike is great fun to ride in the bush.

To address the shorter ratio gearbox, I fitted a complete set of WR400/426 gears (slight case mods required) and dropped the final drive ratio down to 13/52.

IMS, Clarke and Acerbis all make long range tanks, and you can fit a fuel tap with a reserve to give some warning if you are running low on fuel. I have a 13ltr IMS tank.

The power delivery is smoothed out by adding a heavier flywheel - in my case a 9oz GYTR flywheel. Some people prefer heavier ones, but I still like to be able to feel the snap that the engine produces - although it does make it a bit of a handful in the wet clay at times.

The standard exhaust pipe does a pretty good job of allowing the bike to 'tractor' when needed - I fitted an aftermarket silencer to drop the noise level down.

The rear suspension was able to be adjusted to cope well in standard form, but I modified the shim stacks in the front suspension to soften the low speed initial hit, as it was harsh in standard form.

I initially bough an aftermarket 'lighting' stator for running the lights, but this failed on the first trip out (luckily just a few kms from home), so I replaced it with an LED kit setup from Small Coil Rewinds - not the brightest of lights, but legal for rec rego.

A set of barkbusters, bash plate, pipe guard, and it was good to go!

It is still a motorcross bike, but just a 'softened' version.

Final cost worked out cheaper than getting a euro 2T, but not by much. I also miss out on the electric start, but that hasn't really been an issue so far.

I enjoy customising things, so the conversion work on the YZ was a fun project.
« Last Edit: June 01, 2012, 08,52:11 PM by flipper » Logged
Serge C
Full Member 2013/2014

Posts: 3011



« Reply #5 on: June 01, 2012, 11,01:45 PM »


Thanks Flipper, I'm sure Glenboy will appreciate your input.
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"He may look like an idiot, he may sound like an idiot, but don't let that fool you...he really is an idiot!" - Groucho Marx.
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