08-30-2013, 05:12 PM #1
Sooooooo.....Does Boring over 1.5 all 3 pistons in a 1200 xl make it a 1300???
So I took my 98xl to the lake yesterday and met up with one of my buddies with the same year yami with a original stock engine(1200cc)......we were talking about the ski's and I had mentioned to him that my engine blew up a few months back and I completely rebuilt it with over sized pistons(1.5 bored over)....well we raced a few times around the lake and his stock xl couldnt keep up with mine......my GPS was hitting 63-65mph and his was hitting 55mph wot.....he said there is no way that ski is a 1200cc...after I bored my engine over 1.5 on each cylinder it would make it a 1300cc......is there any truth to what he was saying......I dont see how boring all 3 cylinders 1.5 over would make a 1200cc into a 1300cc........but mine does take off fast and has great top end than any ski on the water yesterday...
08-30-2013, 09:10 PM #2
No - should make it 1171 cc's. Your stock motor should actually be 1131 cc's. Displacement=bore(84mm) squared x .7854 x stroke(68mm) x number of cylinders /1000.
08-31-2013, 07:51 PM #3
- Join Date
- Jul 2010
it does give it more power. but 8-10mph..... it unlike. Make sure you are not running lean.
08-31-2013, 09:37 PM #4
1.5 bored over???
like 1.5 mm over?
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