hey everyone. i wanna know what your opinions are on a 686 and a 727 kit.as u can see from my bio is that im ready for the next step on my raptor. i would like to step up on my motor now that it handles well now. i'd like to make a good educated decision on my next upgrade. so i was wanted to know from you guys if you are happy with your 686's and 727's, how much did it cost you, and what would you do different.i dont want to make any mistakes that i would regret later. i've been reading a lot of comments about some of you that have these kits and some of you regret or wish that you had gone with the low compression pistons. WHY IS THIS? who did your work? i see that some of you went with CRAYCRAFT, ive never heard of them until i read these message boards. do you like their work?

 

If you plan on doing it right and replacing the rod I'd go with a low comp. 727.

 

Craycraft for sure - great work, great prices, and unbelievable customer service. It's only a little more expensive to go 727 once you have the motor torn apart, the cases have to be machined for the 105mm piston. Lots of folks go low compression because they ride a lot and don't want to buy race gas. Depends what you are going to do with it, I went high compression for drag racing.

By the time you buy all the components to make a big bore Raptor scream, you'll be into it for $5k or better.

 

If you give Bob a call he can go over the differnt engine packages he has. 686 or 727....or 740! You will be happy with whatever route you go.

 

I had my 690 built in Jefferson Oregon and it is very fast and has not given me any problems.If you want to talk to the builder you could call 541-327-3431 and ask for Chuck and tell him Mike with the silver 690 told you to call.If you have any more questions you can send me a PM .

 

It all depends on what kind of riding you want to do...do you wanna ride on trails? or do you want a high-performance duner?, or drag racing machine? or something in between all of those? The 686 kit looks like itd be good for trail riding and it could be modified into a awesome drag racer and a decent duner...the 727 kit is a big kit, carbs and everything. That would be for a high performance duner or drag raceing...you could ride it on trails also. I was looking at some of those kits when i had money, but at the bottom of one of the 727 kits page, it said, "will probably require frequent rebuilds" thats my opinion on this, id personally go with a higher performance 686 kit...

 

A properly built 727 will be just as reliable as any 686 or 690. My 727 is nearly 2 years old, and hasn't needed a rebuild. It fires right up, even in low temps, and goes to a high idle(thank's the stock carb's choke) just like it did when it was stock.

My advise would be to do what I did. Make a plan of what you'd like to see out of your build. And then call all the major builders and see what they can do for YOU. I personally went with KENZ. But I'm sure you could not go wrong with any reputable builder.

 

Anything that is properly maintained and not abused should have good reliability. There's a 770 around here that ran 2 and 1/2 years before it need freshened up. On Powroll's website they say it required frequent rebuilds, but this one ran great, and had one year of NOS on it.