By far the fastest CB160 racing with AHRMA was torn down last year at
Daytona, and found to be completely legal. Make no mistake, however -
Denny rides the hell out of that bike.

--- John Branson <jbranson@...> wrote:

> James,
> Pistons are a big question. Most people getting the best hp are using
> some kind of custom piston they have made special. I use 56, and 57mm
> pistons on which I've tweaked the design four times...going on five.
> AHRMA limits Honda 175s' to about 184cc so your choices are a bit
> limited. There are some after market 3mm oversize kits (55mm) but they
> are total crap. For legal AHRMA racing your best bet may be 1mm or 2mm
> oversize OEM Honda pistons if you can find them. Although I have my
> doubts as to how many AHRMA guys are actually running legal
> displacement.....not that I agree with the rule anyway...moot since I
> very rarely race with AHRMA over here on the east coast.
>
> MegaCycle will regrind your stock cam. The two most common profiles
> run in these engines is the 122x4 "road race" cam and the 122-20 cam.
> Many people have found the 122x4 cam to be way too radical for road
> racing ( I've tried one), abusive to the valve train and it really
> kills low end power. The 122-20 seems to be the most popular
> grind...works well for me. I might even try the 122-00 sometime, it's
> even milder and is supposed to produce good low end power...which
> these engine really need depending on the track.
>
> You can find some basic info on 175 race bike setup at my site here:
> http://www.jrbranson.com/HondaRacer/mainpage.htm
>
> JohnnyB
>
>
>
>
> --- In CB175RaceTech@yahoogroups.com, "ejparilla" <ejparilla@...>
> wrote:
> >
> > Great site. I have a 175S that I race in AHRMA and am looking for
> some
> > info. What pistons do people use and who does the cams.
> > thanks
> > James Britton
> >
>
>
>
>
>


Any sufficiently advanced incompetence is indistinguishable from malice.

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