SWM tl320 clutch upgrade update

[Twinshockwobbler]

Hi all, just a bit more info that might help you all out with dragging clutches. As you are aware if you read my other posts, I fitted an Aprilia TX311 clutch hub to my 83 TL320. That along with the 12mm ball bearing conversion did make a huge difference. However, I recently came across a new steel internal clutch arm (the one with the kit is cast aluminium and difficult to extend) which I extended by 10mm, this again made the clutch pull a tad lighter. 
when riding the bike in practice or events I noticed the clutch developed a bit of drag, not enough to stall the bike but enough to make finding neutral a pain while waiting in turn at a section. I initially thought this is the plates sticking because when roughed up it seems to cure it. I obtained some new steel plates from motoswm as Martin sells the type with dimples that retain the oil better and built the stack up to the correct Aprilia spec. When I put it all together something just didn’t seem right, I’d not changed anything other than the plates but it appeared that the stack was very snug in the basket depth wise, almost not enough room for the friction plates to move about. I tried the bike and it just stalled and even when I got it going the clutch just wouldn’t clear???? I pulled it apart again and got hold of the Aprilia basket I bought with the hub. I’d been using the SWM basket as they are identical or so I thought, I measured the depth of friction plates slots in both baskets, the SWM basket came up at 29mm and the Aprilia 31mm. I fitted the Aprilia basket and reduced the stack height to a fraction just under the spec buy fitting one or two of the older plates, put it all back together and tried it….no drag, no stall, ok let’s try it out in practice. Rode it for four hours in practice which is probably more than you would in an event as your not stopping so much and had no issues at all, was as easy to find neutral at the end as it was at the start. 
hopefully this is an end to the SWM clutch woes oh and I use 80w oil to. Not sure if this will help out but worth a look next time you’re in the motor. I’ve attached a couple of pics showing the difference in hubs.