FS570 w/ 663cc big bore kit

Torque Monster · Mar 26, 2012

Got it on the dyno and nearly finished - runs pretty good.

Chas · Mar 26, 2012

Wow! Tell us about the engine. Must be bore and stroke. A bore job only would require a 108 mm piston!!

berglsmerg · Mar 26, 2012

ooooooooooohhhh yeah, 68 at the stink wheel !!!!!!! Good news mate that sounds like a whole bunch of fun.

pedroFS · Mar 26, 2012

that dyno chart is pretty useless without the before run on the same machine. do you have the figures for before?

Torque Monster · Mar 26, 2012

pedroFS said:
that dyno chart is pretty useless without the before run on the same machine. do you have the figures for before?

Stock they make 56-57hp

This wasn't a tune of a stock motor to see what you could get out of stock parts and tuning, so the dyno isn't useless to me. This is the only Berg that exist in the world with this mix of parts so there is NO baseline to check a before run. This is the baseline. Thought I'd share, some may like to drool.

jkl · Mar 26, 2012

Here is a thread on a 570 build with before and after dyno results and it is not finished yet.

http://www.supermotojunkie.com/showthre ... ure-thread

Chas · Mar 27, 2012

I am still mystified as to the actual engine displacement. Did you really get 663cc with a simple big bore kit? That would require a monstrous, and I would think unobtainable, 108mm bore size.

Torque Monster · Mar 27, 2012

78mm x 104mm = 663cc

104mm is as big as the bore can be safely done, I could have gone 105mm but was told reliabilty would be greatly reduced. 78x104 is a know commodity with a few KTM tuners/builders - some mods and it also fits the Berg.

jlburgess · Apr 1, 2012

I noticed you are in Bremerton, Wa. Are you running that at PGP? Would be a blast at ORP also! I'm running the Oregon Superbikers club this year. Come out and play :cheers:

Torque Monster · Apr 2, 2012

jlburgess said:
I noticed you are in Bremerton, Wa. Are you running that at PGP? Would be a blast at ORP also! I'm running the Oregon Superbikers club this year. Come out and play :cheers:

Thanks for the invite, don't think this baby will pass the sound check at Mac.

kneedown · Apr 6, 2012

That HP figure is impressive, but what really strikes me is how linear and flat the torque curve is. Very nice!

Torque Monster · May 24, 2012

jlburgess · May 24, 2012

That should be a beast at ORP. Might be hard to get the power down on kart tracks though? Fastest guy around here rides a CRF250.

Tfunk · Sep 4, 2012

And the story continues.......

http://www.supermotojunkie.com/showthre ... berg-FS665

FS570 w/ 663cc big bore kit

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