Daniel Metal Ponies Wrote:
> Cool.. so if I understand this correctly.. you cut
> the fan cover for initial clearance issues but no
> longer have that problem? As you plan on buying a
> new fan cover?
Yep, bingo. This current set-up would clear the V1 shroud but I just haven't got around to buying another cover yet as it wasn't severely affecting my tuning process. My head temps are definitely within safe values and I couldn't be more pleased with the Polini's performance... I'm coming up on 700 miles on this kit soon and my cylinder walls are still as shiny as ever (maybe I have amsoil saber to thank for that though!). I will be getting an NOS cover soon, and am curious to see how it affects the cooling compared to my current set-up.
> And just a heads up.. in my limited knowledge of
> mopeds.. if your doing 55mph (and if you intend to
> go faster), getting your head resquished will, per
> normal increase case pressure - but will increase
> the cylinder/head temperature as well.. you may
> want to leave it as is for a high rpm bike.. just
> my 2 cents, I could be wrong.
Hmm ... I hear ya. The thing is, these BRN heads though advertised as "80-90cc heads" have a pretty small combustion chamber that's really more suitable for 50cc kits. Adjusting the squish in this case would basically be enlarging the chamber to better match the 47mm bore of the Polini kit, which should decrease my case pressure and head temperatures. (correct me if I'm wrong here??)
Not to mention the casting quality is pretty sketch, like all other BRN products. Graham Motzing has more info on these heads, which you can read in his review on treats .
but who knows I might just clean up the chamber's casting flaws and leave it as is...Thanks for your posts dan, great feedback!