426 over heating how many out there do it?

[ranger400ex1994]

i am posting this for my buddy becasue he is either going to have a 416 or a 426 10:8.1 compression piston installed and he was woundering if a 426 will over heat often? and how reliable are they? is that a big power difference between the 416 and the 426?

[quadmxracer]

I've never had a problem with mine overheating. As to wether or not its more powerful than a 416 personally I've ridden both and not really a whole lot of difference. Both rev fast as heck, pull hard, and run well. But also I would suggest that your friend get a cam (if he doesn't already own one), port and polish the head, and get a full exhaust then he will love it. But ive also ridden a 400ex with the 416 kit with ported and polished head but had stock exhaust and it ran good (better than stock motor).
Hope this helps.

[ranger400ex1994]

thanks i will let him know.

[RAPTORAZ]

Detonation is what will heat them up quick. I use a gallon of race gas in mine in the summer months. Other than that, a 416 or 426 will only run a little warmer than a stocker. The performance difference between the two will be little to none. At the minimum, I'd put in a cam as well. The stocker is really tame.