rogerowen Posted July 16, 2019 Report Share Posted July 16, 2019 Anyone know of a reason why a new butterfly should not fit properly? Is there a right way / wrong way. One carb fits fine, the other is sticky and doesn't fully close.The old one fits fine, bad manufacture of the new one? Quote Link to post Share on other sites
stuart Posted July 16, 2019 Report Share Posted July 16, 2019 Have you got it the right way round? They are chamfered slightly one side. Stuart. Quote Link to post Share on other sites
rogerowen Posted July 16, 2019 Author Report Share Posted July 16, 2019 8 hours ago, stuart said: Have you got it the right way round? They are chamfered slightly one side. Stuart. Thanks, yes - chamfer noted. Quote Link to post Share on other sites
RogerH Posted July 17, 2019 Report Share Posted July 17, 2019 Hi Roger, did you centralise the butterfly first and then nip up its attachment screws? Roger Quote Link to post Share on other sites
rogerowen Posted July 18, 2019 Author Report Share Posted July 18, 2019 23 hours ago, RogerH said: Hi Roger, did you centralise the butterfly first and then nip up its attachment screws? Roger Yes, it sat fine until tightening the screws - then it would stick. Other carb was no problem with new disc. Old disc fits fine so have put that on back on. Now looking for a good carb set up procedure. Quote Link to post Share on other sites
stuart Posted July 18, 2019 Report Share Posted July 18, 2019 38 minutes ago, rogerowen said: Yes, it sat fine until tightening the screws - then it would stick. Other carb was no problem with new disc. Old disc fits fine so have put that on back on. Now looking for a good carb set up procedure. Where did the offending butterfly come from? Send it back and complain. I buy all my SU parts from here, they have tech books too. http://sucarb.co.uk/ Stuart. Quote Link to post Share on other sites
rogerowen Posted July 18, 2019 Author Report Share Posted July 18, 2019 17 minutes ago, stuart said: Where did the offending butterfly come from? Send it back and complain. I buy all my SU parts from here, they have tech books too. http://sucarb.co.uk/ Stuart. Ordered from Rimmer, but the box says Burlen. What I did notice was a scratched cross on the offending disc - maybe it didn't pass QC but still found its way to me. Done a lot of fettling on this particular project - one wheel cylinder was badly cast and the handbrake lever was jamming, but a few minutes with the Dremel sorted that. Brake drums will be sorted on arrival of a 9/16th reamer. Tempus Fugit! Quote Link to post Share on other sites
stuart Posted July 18, 2019 Report Share Posted July 18, 2019 2 hours ago, rogerowen said: Ordered from Rimmer, but the box says Burlen. What I did notice was a scratched cross on the offending disc - maybe it didn't pass QC but still found its way to me. Done a lot of fettling on this particular project - one wheel cylinder was badly cast and the handbrake lever was jamming, but a few minutes with the Dremel sorted that. Brake drums will be sorted on arrival of a 9/16th reamer. Tempus Fugit! I find buying from TR Shop a better bet. Stuart. Quote Link to post Share on other sites
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