rrr Posted April 1, 2006 Report Share Posted April 1, 2006 Ok here's the deal.Tried to make a search bur couldn't find an answer. I'm buying a coolhead and I'm wondering what size of domes would be safe. Stock motor, no port and will have a set of pro circuits pipes on. I'm at sea level and I ride mostly on 87 octane. There is no way I can get better gaz than that where I ride sometimes and I don't want to bring some octane booster with me. Do you think it would be safe with 21's or 22's is the only ones safe? I think stock is around 23cc if I calculated right. Thanks Quote Link to comment Share on other sites More sharing options...
crazywheelerman365 Posted April 1, 2006 Report Share Posted April 1, 2006 Why cant you get higher octain I've heard of small towns but you outa be able to get 91 or 93 ... I would'nt run anything lower myself but that just my .02 cents... Quote Link to comment Share on other sites More sharing options...
rrr Posted April 1, 2006 Author Report Share Posted April 1, 2006 I'm in Canada and sometimes I go riding really up north and they don't have higher octane gaz than 87 . When I can I put 91 or 93 but I have to be safe with 87. I checked on nossmachine site with the chart they say stock is 130psi at sea level and with 21 it's 156psi. If stock is around 23cc I guess 22cc should be around 145psi. What do you guys think? Quote Link to comment Share on other sites More sharing options...
letsgetthisdone Posted April 1, 2006 Report Share Posted April 1, 2006 I wouldn't run anything lower than 91 octane, even in a bone stocker with pipes. Quote Link to comment Share on other sites More sharing options...
dlnoss Posted April 1, 2006 Report Share Posted April 1, 2006 What is the elevation there? Quote Link to comment Share on other sites More sharing options...
rrr Posted April 1, 2006 Author Report Share Posted April 1, 2006 It 700 ft with 87 octane the rest of the time I run on 91 at sealevel Quote Link to comment Share on other sites More sharing options...
rrr Posted April 3, 2006 Author Report Share Posted April 3, 2006 I checked on magicracing for domes and they say the stock size is 26 cc this sound really big. Can somebody confirm what size they are? Quote Link to comment Share on other sites More sharing options...
Banshee17Racing Posted April 3, 2006 Report Share Posted April 3, 2006 i always thought the stock size was 24 cc's. I think I would use the 22's, but Dave will chime back in here sooner or later. I use 21's at 700 ft and I'm pushing 155 psi with a port. I've been using 93 octane since I bought her. Quote Link to comment Share on other sites More sharing options...
Tim C Posted April 3, 2006 Report Share Posted April 3, 2006 Stock is about 23cc and you'll have to run 22cc domes because 21cc puts me at about 150lbs and that would definitely be too high for 87 octane. Personally I wouldn't run 87 octane in my bike even if it was stock. Quote Link to comment Share on other sites More sharing options...
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