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Old 11-14-2017, 01:32 AM   #81
bandakias
 
Join Date: Nov 2008
Location: Greece
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Re: More power 1250.

This is mine with yoshi camshafts and compression, but without porting.
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Old 11-14-2017, 01:17 PM   #82
Blicharski1989
 
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Location: Marana, AZ
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Re: More power 1250.

that looks really good. Do you have any people that you recommend for porting? I would really hate to send my head off and have it hacked up.
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Old 11-14-2017, 02:12 PM   #83
Blicharski1989
 
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Re: More power 1250.

did you mill the head for compression or change pistons?
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Old 11-14-2017, 02:52 PM   #84
bandakias
 
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Re: More power 1250.

Sorry i can not recommend for porting. For compression i milied the head, much cheaper
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Old 11-14-2017, 05:07 PM   #85
Blicharski1989
 
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Re: More power 1250.

how much did you mill to go from 10.5:1 to 12:1?
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Old 11-15-2017, 01:10 AM   #86
bandakias
 
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Re: More power 1250.

I milled the head 0,7 mm and 0,1 the top off the cylinder blocks. For yoshimura camshaft it is should be ok. On my friends bandit they went more, 1mm on head and 0,2 on the block, but with high duration 254/1mm intake camshaft.
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Old 11-15-2017, 11:52 AM   #87
Blicharski1989
 
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Re: More power 1250.

cool where did he get his cam?
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Old 11-15-2017, 12:21 PM   #88
bandakias
 
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Re: More power 1250.

Regrind the intake camshaft is the only other option beside the yoshimura camshafts
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Old 11-15-2017, 02:58 PM   #89
Blicharski1989
 
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Re: More power 1250.

oh ok. are there any gains to be has from the exhaust cam? wondering if I just had the intake cam ground to a 244-248 duration.
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Old 11-16-2017, 12:46 AM   #90
bandakias
 
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Re: More power 1250.

Yes you need to ground the exhaust as it is very very small. Yoshi exhaust is 220 duration 7,4mm lift so something about there, no more than 224. Intake can be regrind up to 8,8mm lift. That seems to be the limit. Yoshi intake is 234/ 8,8 lift. About intake duration you can compare the 2 dyno.
Of course they are different days with quite different temperatures but you can get an idea. The first is intake 254/8,8mm exhaust 220/7,2mm , 1,2mm shaved head/block for compression and head work. The second is yoshi cams, 0,7mm shaved head. Both bikes used same header and ecu hacked. As you see first one is much better at high rpm about the same middle and a little worse at low.

Last edited by bandakias; 11-16-2017 at 12:57 AM.
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Old 11-16-2017, 01:17 AM   #91
Blicharski1989
 
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Re: More power 1250.

are you referencing the dyno graph above?
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Old 11-16-2017, 10:37 AM   #92
bandakias
 
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Re: More power 1250.

The dyno above with 143 rwp is with the yoshimura.
The dyno on page 4 with 152 rwp is with 254 intake.
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