250 racer engine set up advice - missing power?

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bendik
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Joined: Sat Jun 22, 2024 10:08 pm

Re: 250 racer engine set up advice - missing power?

Postby bendik » Mon Sep 16, 2024 10:37 am

Pictures of the intake. The ports was big from before but really narrow and w no bowl under the valve. So I tried to open it up a bit in this area and lift the roof a bit. I did not epoxy in the floors like I should probaly have done.
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bendik
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Re: 250 racer engine set up advice - missing power?

Postby bendik » Mon Sep 16, 2024 10:39 am

Exhaust. This one has a welded on part from before so the port is also longer than original
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bendik
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Re: 250 racer engine set up advice - missing power?

Postby bendik » Mon Sep 16, 2024 10:40 am

Chamber design
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Bevel bob
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Joined: Thu Apr 15, 2010 8:01 am
Location: Bromley Kent UK.

Re: 250 racer engine set up advice - missing power?

Postby Bevel bob » Tue Sep 17, 2024 4:19 am

The head does not look heavily ported ,so there could be some room for improvement , but dont remove the guide support boss as reliability will suffer.
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