In Shelracing "Delta" thread I mentioned I've purchased on of these, http://www.motorbikeparts.co.nz/prod...product_id=538 The FXR had a dodgy Sketchey home made muffler when I brought it off him, and I quickly knocked one up to tidy the bike up. we I had good intentions to sort it out but 3 seasons later I finally got round to it.
Other than a XL250 (old) carb and no filter in the airbox (yes it still has the airbox) the motor is bog stock standard. I fitted the muffler using the standard header and fitted the slipon as a underslung, more 'cause it was easy nothing scientific about it.
The bikes gained 9 Kph and showed on the track today, Its still loosing out to the CBR's and "hot" FXR's with cams, CDI's ported heads and flatslides but by fark all. Its the best $105 I've spent on a bucket.
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