milto29 Posted March 10, 2013 Report Share Posted March 10, 2013 Hey guys I have a 03 Banshee with 66.25 pistons , stock crank and stock ports. I also have a Pro Design Cool Head with 20cc Domes , stock carbs with stock reeds. For pipes I have CPI with Silencer's. I live in Miami and my compression is 165 so I have to run AVGass 100ll. I run 32/1 PENNZOIL MARINE® PREMIUM PLUS 2-CYCLE SYNTHETIC BLEND OIL. With stock gearing , I was wondering what can i do to get more Top End ? Is it possible to Port my Cylinders ? Or is the Bore to Big ? Thanks Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted March 10, 2013 Report Share Posted March 10, 2013 What type of riding do you do? In some cases I think going aftermarket it a better deal and set up. Quote Link to comment Share on other sites More sharing options...
milto29 Posted March 10, 2013 Author Report Share Posted March 10, 2013 I do mostly Trail Riding lots of straight Trails. Quote Link to comment Share on other sites More sharing options...
milto29 Posted March 10, 2013 Author Report Share Posted March 10, 2013 Any Suggestions will be greatly Appreciated. I have just ordered a 15Tooth Front Sprocket. Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted March 11, 2013 Report Share Posted March 11, 2013 you'd be throwing away your money if you port em right now. Depending on how much your looking to spend....you could go like loco suggested and get different aftermarket cylinders to make more power, or you could also go with pod style air filters, reeds, and +4 timing. Those little things will need to be done to make the most power on aftermarket cylinders anyways. Quote Link to comment Share on other sites More sharing options...
421alkybanshee Posted March 11, 2013 Report Share Posted March 11, 2013 i would quit running marine oil also, start using a atv good atv oil like klotz or somthing. just because your in the land of boats in miami doesnt mean you need marine oil...lol 1 Quote Link to comment Share on other sites More sharing options...
milto29 Posted March 11, 2013 Author Report Share Posted March 11, 2013 Thanks for all of your replies. I forgot to mention. I do have Pods and +4 on timing. As for the marine oil. I like the smell better then Klotz which I also have at home. I also have Hi Flow impeller and Trail Tech Vapor. For Speed , Temp and RPM. Quote Link to comment Share on other sites More sharing options...
milto29 Posted March 11, 2013 Author Report Share Posted March 11, 2013 Thanks for all of your replies. I forgot to mention. I do have Pods and +4 on timing. As for the marine oil. I like the smell better then Klotz which I also have at home. I also have Hi Flow impeller and Trail Tech Vapor. For Speed , Temp and RPM. Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted March 11, 2013 Report Share Posted March 11, 2013 I can't speak for other builders. But, I won't port a set of last bore cylinders for a customer. Bad investment in my opinion. As earlier posts said, look into the additional supporting mods and look into some different oil. Marine oil is designed for engines with a much cooler operating temperature. As for porting you could(should) look into new/er cylinders first. You can go aftermarket or find a set of low bore stockers. Nice looking bike btw Quote Link to comment Share on other sites More sharing options...
milto29 Posted March 11, 2013 Author Report Share Posted March 11, 2013 Thanks. I think ill just do that. This is a fresh Top End. Ill have to look for set of stock cylinders then. She's got lots of low end power. I just want more speed. Quote Link to comment Share on other sites More sharing options...
milto29 Posted March 20, 2013 Author Report Share Posted March 20, 2013 Standard Bore Pro Design 20CC Domes on a set of 66.25 Jugs is that OK ? Or do I need Big Bore Domes ? Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted March 20, 2013 Report Share Posted March 20, 2013 If you have clearance in the domes for the current pistons don't mess wih them. Check it with a L shaped piece of solder down the spark plug hole.make sure it goes over to the edge of the dome. Also, if your current cylinders were at 66, you could nickasil them, but you are past that so it is time to find a set of cheap stockers on low bore or find something aftermarket. You already have many of the mods to support a ported motor. Quit running marine oil. As stated it is for much lower operating temps and not suited to the abuse of most atv's. Try some dominator, anything castor, klotz, something for ATV's or dirtbikes. Quote Link to comment Share on other sites More sharing options...
milto29 Posted March 20, 2013 Author Report Share Posted March 20, 2013 Thank you for your reply . Ill pull the Head off this weekend and check . What Oil will mix up good with 100LL AVGas ? As for the Cylinders I'm looking around for some but that will be when these Fail . I know 2 Bikes down here in Miami ( Sleepers ) that are Bored to 68 with stock Cylinders and Drag Ported . With a stock Crank and they are a BEAST . Quote Link to comment Share on other sites More sharing options...
Valadezj Posted March 21, 2013 Report Share Posted March 21, 2013 You can put a new sleeve to make them 68mm but its a waist of money , a set of nicely ported cylinders will run better set up right, so buy newer cylinders and have one of the site sponsors port them brandon at wildcard can hook you up. Also putting that big of a sleeve will reduce your water passages on your cylinders and affect cooling. If you have money to spare go 68mm cub and fly Quote Link to comment Share on other sites More sharing options...
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