Best mod to give my 19 yzf 250 more power?

MadsDausel
Edited Date/Time 4/28/2019 9:38am
I coming of a sx 300 and felt I need a little more power. Any ideas?
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DTR830
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DTR830 4/28/2019 6:12pm
4/28/2019 6:12pm
athena big bore
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motox331
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motox331 4/29/2019 7:04am
4/29/2019 7:04am
Porting will help. You can always get a high comp piston if you dont mind running race fuel.
rob162
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rob162 4/29/2019 8:16pm
4/29/2019 8:16pm
High compression piston, Port head, cams and 2nd injector kit in that order.

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Falcon
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Falcon 5/1/2019 10:29am
5/1/2019 10:29am
GYTR Head and hi-comp piston. A friend of mine (former pro) said it worked wonders for his 450F.
Expensive, but massive power gains from what I understand.
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Joko
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Joko 5/1/2019 10:30am
5/1/2019 10:30am
I put a high comp piston and Stg 2 hot cam in my 14 Yz250f, not much improvement. I’d think a big bore, head porting and 2nd injector/ignition may help more.
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garagedog
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garagedog 5/2/2019 1:47pm
5/2/2019 1:47pm
Count how many times you turn the throttle all the way to full open on the track.
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ZB93
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ZB93 5/2/2019 2:32pm
5/2/2019 2:32pm
Joko wrote:
I put a high comp piston and Stg 2 hot cam in my 14 Yz250f, not much improvement. I’d think a big bore, head porting and...
I put a high comp piston and Stg 2 hot cam in my 14 Yz250f, not much improvement. I’d think a big bore, head porting and 2nd injector/ignition may help more.
I've been debating a hc piston and cam for my 17... did you pick up any more up top??
Joko
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Joko 5/2/2019 5:00pm
5/2/2019 5:00pm
No, maybe a little less on top

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