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Big Bore Project done!!!!

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17K views 121 replies 41 participants last post by  CosmoK  
#1 ·
Just got the big bore kit installed and started the bike this evening. If the weather holds out i will be on the dyno for the break-in and then will be ready for the HP numbers. With my mods i should be close to 200bwhp after remapping. Will let you guys know the results when i get them.
 
#3 ·
Can't wait to see the results!!!!!:jump
 
#5 ·
Fill us in on some of the specifics, ie: je pistons or wiseco? piston size? cams? head work? stock con rods?
 
#9 ·
yamamayzf1000r said:
Fill us in on some of the specifics, ie: je pistons or wiseco? piston size? cams? head work? stock con rods?
For the 04. 1050cc with JE pistons. 2mm overbore and its been ported, polished and valve's has been back cut and the head has been deck .10. The compression without the decking is 13.1 with the decking 13.7. Its reliable with the stock rods. It should be close to 200 all motor. I will keep you posted on the results but right now its 10 degrees and if it dont warm up today it may be sunday before i can get a baseline before tuning.
 
#11 ·
This kit has been in use for approx 8 months i think with no problems. There is a 3mm over that is being tested but i think the walls will be too thin for this. There is plenty of room for the 2mm over. You can believe the test or just someone that says it wont work. I myself believe the real world test. just my .02
 
#12 ·
smokeuu said:
This kit has been in use for approx 8 months i think with no problems. There is a 3mm over that is being tested but i think the walls will be too thin for this. There is plenty of room for the 2mm over. You can believe the test or just someone that says it wont work. I myself believe the real world test. just my .02
Hey I hear ya.

Does the big bore kit come with the porting, polishing and valve's that are back cut and w/ the head decked at .10 ?

Or is that extra?
 
#24 ·
All Smiles said:
Hate to burst your bubble, but there is no way you will be getting 200bwhp. Pascale Picotte's shop has done it for a couple of clients, and was thinking of doing it for mine, and you will gain 18hp extra max.
I feel a "owned" pic with your post on it will be seen soon.

Not to bust your bubble All Smiles,......

It's just that Dennis knows his shite.

And he said "should be close to 200".......hell, 190+ and he's done it in my book.
 
#26 ·
R1_enough_said said:
I feel a "owned" pic with your post on it will be seen soon.

Not to bust your bubble All Smiles,......

It's just that Dennis knows his shite.

And he said "should be close to 200".......hell, 190+ and he's done it in my book.
I promise 190 + all motor. I am at 164 all motor without the big bore and the headwork.
thanks for the props R1_enoughsaid.