fitz18 Posted October 26, 2007 Report Posted October 26, 2007 Sorry if this seems like a real dumb question guys but can someone explain to me what size bores cylinders go up in. I know stock cylinders are 64.00 but do they go up in like certain intervals? Also what is the largest size thay can be bored? I know this might seem like a stupid question but Im looking to buy some ported cylinders from ebay and want to get good ones. Thanks Quote
00tbanshee Posted October 26, 2007 Report Posted October 26, 2007 (edited) Sorry if this seems like a real dumb question guys but can someone explain to me what size bores cylinders go up in. I know stock cylinders are 64.00 but do they go up in like certain intervals? Also what is the largest size thay can be bored? I know this might seem like a stupid question but Im looking to buy some ported cylinders from ebay and want to get good ones. Thanks every ten thousands over is .25mm so 64.50 would be twenty thousand over you can go hundred over before you need to resleeve.66.50 would be the last bore Edited October 26, 2007 by 00tbanshee Quote
KEVSWS6 Posted October 26, 2007 Report Posted October 26, 2007 Sorry if this seems like a real dumb question guys but can someone explain to me what size bores cylinders go up in. I know stock cylinders are 64.00 but do they go up in like certain intervals? Also what is the largest size thay can be bored? I know this might seem like a stupid question but Im looking to buy some ported cylinders from ebay and want to get good ones. Thanks Stock is 64mm then it goes up by .25mm until you get to 66.50 Each .25mm is 10 over. Careful on EBay buying cylinders especially if they are ported. Quote
KEVSWS6 Posted October 26, 2007 Report Posted October 26, 2007 every ten thousands over is .25mm so 64.50 would be twenty thousand over you can go hundred over before you need to resleeve You beat me to the post but we both know your SLOW! Quote
sled Posted October 26, 2007 Report Posted October 26, 2007 i think its like 64, 64.50, 64.75, 65 and so on. 66.50 i think is the biggest on stock jugs. Quote
00tbanshee Posted October 26, 2007 Report Posted October 26, 2007 thats funny you did my motor. if its slow its your fault.lol we really know what it does. :thumbsup: Quote
Bansh-eman Posted October 26, 2007 Report Posted October 26, 2007 yup the first jump is from 64.00 to 64.50, then its .25 every size after up to 66.50 check this link out good to use as a bore refferance Link Quote
fitz18 Posted October 26, 2007 Author Report Posted October 26, 2007 Thanks for all the answers. Cleared that up for me guys. Why would I need to be careful when buying off ebay? Quote
fitz18 Posted October 26, 2007 Author Report Posted October 26, 2007 (edited) Also I was looking at these ones on ebay http://cgi.ebay.com/ebaymotors/Yamaha-Bans...1QQcmdZViewItem He must have the wrong bore size. What do yas think? Edited October 26, 2007 by fitz18 Quote
Bansh-eman Posted October 26, 2007 Report Posted October 26, 2007 (edited) i just checked weisco website and they DO offer a 64.25 prolite. not sure why it commonly isnt offered on alot of sites... edit: i think that might be Firehead (Mark) from BHQ selling those Edited October 26, 2007 by Bansh-eman Quote
fitz18 Posted October 26, 2007 Author Report Posted October 26, 2007 i just checked weisco website and they DO offer a 64.25 prolite. not sure why it commonly isnt offered on alot of sites... edit: i think that might be Firehead (Mark) from BHQ selling those Thanks bansh-eman. Whats the difference in a prolite and normal piston? Quote
Bansh-eman Posted October 26, 2007 Report Posted October 26, 2007 prolites are forged pistons rather then cast like oem Quote
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