What Domes?

[Geoff]

Ok I already run 50/50 mix(92/110) but I'm not sure what cc domes. I only ride a sea level and I would prefer to keep running mix rather than straight race gas but if I have to I would. I bought my bike used supposebly the head was shaved and been ported but I'm not sure, haven't had it apart. I checked the compression awhile back and it was only around 115 or so but I had one of my dads old compression testers and I don't think it had the right adapter(to short). I have +4 timing now should I run 19's or 20's?

 

I ride exclusively at the Oregon coast for any of you Oregon guys that wanna help a brother out,lol. Any help would be great.

 

Thanks Geoff

[Ducman]

You could easily do 19cc domes on 110/92 50% mix. I wouldn't recommend getting to crazy with the compression untill you know if the crank has been welded through, 20 cc domes are considered reasonable on a stock crank, 19 are starting to push it, especially if your cylinders are ported and you are making a fair amount of HP over stock.

[Animalman294]

You really need to get a better compression reading, even for shaved head and port work, I think 110 psi is a little on the low side. I thought stock banshee's run like 135psi, and if yours dropped below 100 you had problems.............check again :beer: