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Dirt Bike Brands - Other
04 XR250 Basic Mods?
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[QUOTE="highmileage, post: 1123785, member: 54462"] The Hot Cams Stage 1 cam, and 280 kit (277cc/77mm or 284cc/78mm) @10.5:1 ratio and aftermarket exhaust (Thunder Alley) is a really good set-up and pump gas compatible. These are economical big bore kits and don't require re-sleeving or case mods. Cost is under $500.00 usd ready to roll. Some go 77mm so the have a bore over left or some go straight to 78mm...you choose. I went 78mm and have had no problems with heat or other issues. Just use a good motorcycle specific synthetic oil of proper weight for the ambient temps. The great thing about these motors is as long as you don't go weird/radical that they maintain stock reliability. There is a 300cc kit (80mm) available through Thumper Racing that is also a pump gas kit and is better than the hi-comp, race gas 320cc kit IMHO. Both are expensive ($1000.00+ usd) and require re-sleeving and case mods. The thing I found is, like any other XR, the motor can be made to outrun the chassis/suspension....if you are going to build the motor, budget for suspension work, although the updated suspension on your model is a much better starting point. Good luck... [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
04 XR250 Basic Mods?
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