[dukess1999]

I've removed the choicer parts on my 748 prior to selling incl. 50mm full system. I bought some stock cans which the t*sser selling them assured me were 50mm but are in fact 45mm. I fitted them just to get the bike running but it now runs very rough and cuts out unless I hold the revs at around 3k. Would smaller stock pipes have such an obvious effect? Unfortunately I re-routed the throttle cable at the same time so I can't tell if the cable adjustment is set at normal start-up revs.
Bike has sps heads and PC111, and has always run pretty well on 45/50mm half system or 50mm full system, incl. stock 50mm cans for mot.

Ta.