life span on a 416ex

[monstergt88]

sup guys. Well i just sent my engine out to diggin racing. I having them do a whole engine rebuild and boring it out to a 416ex. Im having them also port and polish the heads. The guy said it will last about 20-25 hours since the piston is forged. Im getting

- new connecting rod

- new bearings

- kibblewhite valves and valve springs

- hot cam stage 2

- cometic gaskets.

[zrpilot]

Originally posted by monstergt88
sup guys. Well i just sent my engine out to diggin racing. I having them do a whole engine rebuild and boring it out to a 416ex. Im having them also port and polish the heads. The guy said it will last about 20-25 hours since the piston is forged. Im getting

- new connecting rod

- new bearings

- kibblewhite valves and valve springs

- hot cam stage 2

- cometic gaskets.

Is he nuts? 20-25 hours.... maybe if the quad was NEVER maintained and raced really hard at or near the rev limiter!!!

If I were you I would find another builder. If he think his build quality only lasts 20-25 hours, then maybe you should not give him you hard earned $$$.

Remember we are talking about the mighty 400EX, perhaps the most reliable quad built.

That's my $.02

Whew, I guess I'll get off the soap box now


Good Luck

[xben719]

ya man that is crazy! I know of guys that have three years on there top end and is still running strong. just make sure you maintian it.

[Joe400ex]

:eek2: :eek2: wow i would def go to a dif shop. 25 hours aint sh*t.

[underpowered]

my 426 has been together for over 3 years. i tore it apart to rebuild it this past fall. once i checked everything it was al well within spec, so i put ina new piston and let it be. over the summer i put 20-25 hours a month on mine atleast, sometimes i do that in a weekend of hard riding so you shoudl easily get much more than that out of your quad.

[blown331]

As everyone else says. There would be no point in doing this rebuild if it only lasted 20-25 hours. Unless you were a pro and had engines coming in for free.

With proper maintenance and a good oil it will last way longer than that

[vett_09]

Is that a mistake? Are you missing a 0 at the end of that 25?

[blown331]

??

I don't think you understood what I said? I'm saying 25 hours is absolutely NO TIME for a motor... stock 400's 25 hours is hardly broken in...

If you still don't understand let me know

[vett_09]

Yeah, I agree. I was refering to the original post. My mistake though, I should have quoted it.

[blown331]

no problem.

I was going to say... 25 hours that would suck

[vett_09]

Yeah, what would be the point? Having to send your motor out every 25 hours of riding time for a re-build... Too rich for my blood.

Even with no up keep on the quad it should run longer than 25 hours. My buddies and I ride more hours than that in a single weekend during the summer.