UNI filter installation on a 250

[uthe54]

I checked this site before doing this, but didn't find a reference on installing the UNI filter on the 250, so here are pictures of my installation.

Feel free to comment or make suggestions.

[ckau]

You may need to shorten the sink pipe. you do need the bend in there for filter clearance but too long of a pipe causes a loss of air velocity. you may notice a throttle lag just off idle or a stumble while trying to get rpms up. If so shorten the pipe till the throttle smooths out.
People trying to make snorkle type systems have experienced these problems.

[uthe54]

Thank you for the suggestion. I was thinking it might be too long, but the only way to find out is to test it out. I'll test it out next weekend and give my feedback. I really like how I've got it now, since I'm able to have it strapped on and all. If it doesn't perform well I'll try to shorten it up a little.

[GX150]

250's do better with the UNI directly on the carburetor. Only the 150's need a 6" intake runner.

[uthe54]

ckau, you were right. The pipe was too long. It idled okay, but when I got more than half way on it, it bogged down pretty bad. Since I was out, I just pulled it off and ran with one sink pipe, and ran great! Glad you said something because I had thought it was something clogged in the carb.

I probably need to get a bigger filter. This one I just pulled off the 150 I have.

Thanks for the advice. Once I come up with a perminant setup for the new filter, I'll post pictures.

[EJ Mac]

just put the uni directly on the carb.

[SYCARMS]

EJ is correct, get the proper 2" UNI Filter and attatch it directly to the carb.
TOM

[Sockman]

In case you haven't heard it enough - I agree. Put the UNI right on the carb. Best results that way.