sangheraent Posted February 14, 2014 Report Share Posted February 14, 2014 Ok so I am weighing my options on how to get my banshee back up and running one cylinder is perfectly fine with a couple bores left on it and the other is toast. I was thinking of sleeving the one side and boring it out to the next size up on the other cylinder. So even though I sleeved it I would still be at 65.50. I know the sleeve has to be port matched and all that stuff but is this a viable option? I really just want to save the cylinders they are HJR ported 4mill cylinders that hauled pure ass. I know I can bore the sleeved cylinder up to like 67mm so when my other cylinder gets to its max I can always consider sleeving it so I can keep going. My history with top ends is that they usually go years this top end went 4 years with $2 premix and still had more life if it didn't destruct. So if you think 2 bores won't last me long that's minimum like 8 years and this top end is going on my wifes bike so that will be like 16 years. I ride my dirt bike every weekend to hell and back and it has 3 years on the top end with 180 compression. Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted February 14, 2014 Report Share Posted February 14, 2014 JMO its probably cheaper to buy a cyld, have it bored to that size and have HJR match the porting to the other cyld Quote Link to comment Share on other sites More sharing options...
camatv Posted February 14, 2014 Report Share Posted February 14, 2014 sleeve the cyl you have. match port size to 64mm. run it. i have ran diff sizes in the past with mx bikes that have had one side failures. its no big deal. Quote Link to comment Share on other sites More sharing options...
sangheraent Posted February 14, 2014 Author Report Share Posted February 14, 2014 sleeve the cyl you have. match port size to 64mm. run it. i have ran diff sizes in the past with mx bikes that have had one side failures. its no big deal. so you mean run 64 on one side and 65.50 on the other side? Quote Link to comment Share on other sites More sharing options...
camatv Posted February 14, 2014 Report Share Posted February 14, 2014 yup when the 65.5 eats it sleeve that cyl and then bore both to 64.5 or buy a serval, or buy 2 same bore cyls in low bore or big sleeve and 68mm.. lots of options when you cook a motor these days 1 Quote Link to comment Share on other sites More sharing options...
sangheraent Posted February 14, 2014 Author Report Share Posted February 14, 2014 Is it going to be reliable with a difference like that? I'm no expert but I feel like one cylinder will make a hair more power then the other carb syncing will be tougher but thats no big deal but wouldn't the pressure on the crank be uneven? like one side is trying to turn a hair faster then the other causing pressure on the crank? can't I take the stock jug to like 66? so I would have 65.50 65.75 and then 66? or am I wrong on that one? Quote Link to comment Share on other sites More sharing options...
Starwriter Posted February 14, 2014 Report Share Posted February 14, 2014 This kinda depends on which side you need. Most catastrophic failures happen on the right side, so orphaned left cylinders are easy to come by. Quote Link to comment Share on other sites More sharing options...
sangheraent Posted February 14, 2014 Author Report Share Posted February 14, 2014 Im pretty sure I need a left but I haven't seen any single cylinders on sale I'v been looking. Quote Link to comment Share on other sites More sharing options...
rjdgriff Posted February 15, 2014 Report Share Posted February 15, 2014 Im pretty sure I need a left but I haven't seen any single cylinders on sale I'v been looking.post a wanted add Quote Link to comment Share on other sites More sharing options...
Starwriter Posted February 15, 2014 Report Share Posted February 15, 2014 I have a bunch of cylinders. There is a 62% chance that I have an orphaned left 65.00mm unported cylinder. If I have one, I'll make you a good deal on it. I don't have time to look today. I'll look tomorrow. Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted February 15, 2014 Report Share Posted February 15, 2014 Ugly situation. If it were me, I'd buy new cyls and have them ported, sleeve both of your current cyls and port match them, or finally step up to an aftermarket mono jug set up. 1 Quote Link to comment Share on other sites More sharing options...
sangheraent Posted February 15, 2014 Author Report Share Posted February 15, 2014 Ugly situation. If it were me, I'd buy new cyls and have them ported, sleeve both of your current cyls and port match them, or finally step up to an aftermarket mono jug set up. I Agree. I'm having them both sleeved this is the kind of shit that leaves me at camp while my buddies ride. and Actually because of the damn currency exchange I save $180 by sleeving both cylinders rather then buying new ones and having them ported. Quote Link to comment Share on other sites More sharing options...
lil Doobie420 Posted February 15, 2014 Report Share Posted February 15, 2014 I second" tricked" mono block ftw .did it eat the piston up or is the cylinder just out of spec? Quote Link to comment Share on other sites More sharing options...
sangheraent Posted February 16, 2014 Author Report Share Posted February 16, 2014 lost a c-clip after 4 years of running wrist pin destroyed the cylinder wall Quote Link to comment Share on other sites More sharing options...
Starwriter Posted February 16, 2014 Report Share Posted February 16, 2014 A very respected builder once told me that wrist pin grooves do not effect performance, since they are below the exhaust port opening height and therefore do not effect compression. I have no experience with that. Just what I was told. Quote Link to comment Share on other sites More sharing options...
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