[Blownup]

I just bought this in running condition and now the motor is blown up long story. It measures stock bore and stroke ??? if it is the stock parts or not. It broke a piston skirt I was told four corner seize. It has an edelbrock carb, dual exhaust, K&N intake and a cdi box, long travel. I would like to go bigger and still have longevity!!! I like the fact that Hauck is a 1/2 hour from were I live if you know what I mean. I like going WFO and just cruising around my land. My dad told me your to poor to buy cheep stuff so do it right the first time! Thanks

 

[MRPAT920]

stay away from anything bigger then a 720 ...if you go 800 you will need to run race gas i know i have a 800 big mistake

talk to chris at benchmark he build the strongest 686 around

 

[doghouse]

Another Recommendation

I am on my 3rd Dunning season with a 720. Low compression and small cam. My son in law is almost the same HP with a 686 low compression with Stage 2 Web Cam. My son is getting more HP, but not that much more than the 720 with a 11/1 686 with great headwork and cam. 2nd Season. Best of Luck on your choice.

 

[RuttingRhino]

A lot of which route you take and who you have do it depends on the condition of the parts you have to work with now...

If I were in your shoes I would look for a good deal on a crank-up built motor and buy it and drop it in...

Then decide what to do with your left overs...

You might want to check out AZcourt... he has a benchmark 693 crank-up built motor that has never been run for sale...

Another option is to do a rotax swap... tons of people have done this and they all love it...

You can read all about them in the engine swap section of this forum...

If you rebuild your motor I highly recommend sending your crank to Crankworks in Tempe AZ and have a factory length Carrillo rod installed on it...stick with stock stroke...I would not use an aftermarket crank myself...

 

[Blownup]

Thanks for the input guys, going to call Hauck to see what they have for tamer parts I would really like to keep it local if thing goes bad after its done!!!

 

[a94cobra]

I have the 800 kit. mine was the lower compression kit. 10-1 I think. Never had a problem with pump gas. Bought a few years ago. Lasted till the last trip. It broke the factory rod. Better rods weren't available back then. I bought this one already built from them.

I have enjoyed the motor. Very strong. I have mine in a LT setup and dune with it some.

 

[Blownup]

I called them today and they told me the same thing they make a low and high compression kit. Its good to know about the rod. Did all the other parts hold up like the diffs and axles? Don't want to open Pandora's box!:fingersx:

 

[a94cobra]

I've had gorilla axle issues. But not cause of the motor.

Looks like the JE piston might be the actual cause of my failure. Have had CP recommended as a better replacement. Not sure what Hauck recommends or sells at this time.