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Dirt Bike Brands - Other
Over Heated 00' 400 Sx
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[QUOTE="Smokin Joe, post: 142817, member: 18130"] [b]Thoughts on over heating and c/s sprocket.[/b] Kdxdude- Although I don't have an RFS, I do have a '97 250 EXC that is prone to over heating. I installed Devol guards which just made it worse. After posting here and on Holeshot's forum I made the following changes: 1. Switched to Water Wetter at 4 capfuls per quart of Distilled Water. This helped but did not completely eliminate the problem. I also spaced out the rad shrouds as the '97's did not have a wide front opening. 2. I used a cut off disc in my Dremel and cut out the front grid of the Devol guards. I then shortened the height of the stock louvres to fit in the opening. The other thing I did was to drill 1/2" holes in the back of my front fender to allow more air to get through. It did not overheat after these last mods. The fan is a good idea also and it was something I was going to try next if I still have problems. I think KTM makes an overflow bottle that fits inside of the rad shroud but I am not sure what models it fits however. As far as countershaft sprockets go I seem to be one of the few people that regularly run a 12 toother. I definitely think it is the killer way to go for tight woods. It gives you a granny low that a spode like me fully appreciates. Plus it tightens up the ratios such that being in the absolute correct gear is not as critical, that really helps out in situations when it gets real gnarly and you'd rather not shift or can't. You don't need to rely on the clutch quite as much either. The downside is reduced top end speed. Not a big issue with me as I ride trails where I rarely get above 3rd gear and can still get up to 50 mph or so (fast enough for me where I ride). Also as mentioned it wears out chains and sprockets faster but as far as I'm concerned that's a normal wear item anyway and they still last a good while as long as you buy top shelf items. Economy chains and sprockets could be another matter though. Good Luck! Joe [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Over Heated 00' 400 Sx
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