LegendsRacer - Legends & Bandolero Racing Forum

LEGENDS => Engine Care & Tuning => Topic started by: slack11 on February 18, 2012, 05:24:18 pm

Title: stock compression of a fj120o
Post by: slack11 on February 18, 2012, 05:24:18 pm

Just curious, what is the stock compression of a 1200, if it just came out of a bike.   

Title: Re: stock compression of a fj120o
Post by: VMS Motorsports on February 18, 2012, 05:39:59 pm

Depends on how the bike was taken care of for 20 years.
Not being a smart ass, but the numbers will vary greatly

Title: Re: stock compression of a fj120o
Post by: slack11 on February 18, 2012, 09:05:56 pm

Just wondering if we run these at a lot more compression than stock, or if the 165 is comparable to a stock motor.  Not looking for particulars, just a general idea.

Title: Re: stock compression of a fj120o
Post by: VMS Motorsports on February 18, 2012, 10:49:50 pm

I believe stock they were in the 180 range. 165 was definately de-tuning them

Title: Re: stock compression of a fj120o
Post by: Racinjj on February 20, 2012, 09:42:21 pm

Jim is correct, I had a good stock motor in the bike and it was 180 across.