For reliability and everything, sure seems like it's a waste to punch into the 700's when you got 686's running that strong. I think I'm gonna stick to my 686 kit. just gotta decide who to send my head down for porting, craycraft or sparks? Seems just as good either way, and that you can't go wrong?

 

Yeah but you'll have to wait 6 months to a year to have Sparks do it.

 

I love the guys who think a 730 is unreliable. How many have you heard of that have blown up(that werent done by trinity)? If you want to be in the back of the pack, stick with your 686, I dont mind[img]i/expressions/face-icon-small-smile.gif[/img]

 

me either
[img]i/expressions/face-icon-small-wink.gif[/img]

 

LOL!

 

Reliablity is pretty much a non factor in a 727-740 build. Those guys replace the rod and go thru everything. Now for all the top end 686 guys on a stock rod, you better start saving up for rod day. Like the old STP commercial, you can pay me now or you can pay more later. lol

 

my low compression cruiser should beat a FEW high compression 690's!!! I gaurantee it is more reliable than my old bike or a bike with top end only done!!! If you want a reliable bike, rod, crank balancing, low compression, I would go with a 730 bore. I guarantee a low comp 690 has no chance[img]i/expressions/face-icon-small-wink.gif[/img]

 

I've been to the cinders about a dozen times and i have no idea where you guy were racing at. I get lost out their so easy. I've only been to the "crater" and then the $100 hill next to it. My raptor is a bitzch to jet i run like a 132.5/135 and its runs ok, not good but ok. Except when i get to the top of the big hills its like a 1000 ft difference from the bottom. How do you deal with this prob. Nobody i know, can figure out the correct jets on a raptor up their, what do you run on you raptor that just have a pipe?

 

Great videos, thanks Raptor660Fam!

A moment to discuss reliability of big bores - I've had my Craycraft 730 running for a couple of weeks. In that time, I've pulled a 1700 HP Dynojet dyno (3000 lb rollers) to redline 9 times and practiced full throttle launches on asphalt with drag slicks and a wheelie bar at least 3 dozen times (60 foot time, 60 foot time, 60 foot time!). Temp holds steady at 160-180 with no thermostat or fan but I don't idle for more than a few minutes at a time. It hasn't used a drop of oil. In just a few weeks, I've put this motor through more abuse than my Craycraft 686 ever endured and it hasn't missed a beat. If you choose the right builder, reliability shouldn't be a concern for a big bore Raptor. Save your pennies though, it's not cheap to do it right.

 

My sister can pull out of $100 fairly easy on her CT piped raptor. It still runs a hair rich up there. We are using a dial a jet right now. And we notice more of an improvement in the dunes than the Cinders. The Cinders suck hp from everyone very bad!!!

on FCR's my dad is running his dune jets 142/148