TS 250

[JC]

LWC,
yes I know, but 195 is close enough to 200 for me. If you go to 67mm you leave the liner skirt only 2.5mm think which is too thin in my book.

Doc, yes I thought about a 185ER too, but I rather like to keep to the early 70's era/look & it may just make something half-decent out of a TS185J/K/L

[Doc]

Well in a way it is keeping in with the RL theme by using the reed motor as the later Beamish units utilized reed induction in '78 when the last of the silver engine jobs was sold as the RL250A. The RL325/250 black engined reed induction models ran right up to 1981 and this is what the RL185 could be based upon using the '78 and onwards case reed 185 motor maybe.. too many ideas and too little time don't s'pose you seen any Whitlock RL frames laying around recently?

[LWC82PE]

ok tell me this, will a RL325 barrel fit on a reed valve TS 250ER bottom end? i know the porting will be more conservative for trials use but that could be changed maybe? how rare/hard to get are reed valve RL325 motors?

[Doc]

I believe the 325 RL is nothing like the TS250 Leith. I'd have to double check and I do have a parts list somewhere for the 325 but near sure they're entirely different critters. Base gasket comparison should give an indication

[JC]

I'm believe yr right (again) Doc. As far as I can tell RL325 used regular style reed-valve, not case reed-valve (like RMs) of the ERs.

There were some mag articles in early 70's taking TS/TM250 out to 325 using 80mm piston & new sleeve

[Doc]

interesting thought JC and I remember over in the west, around '76ish, 2 average guys (1 was Ray Ryan can't remember the other off the top) well they built up a CR360 (I think, could of been a 380) using the same stroked overbore principle and a CR250 bottom end. It went like the proverbial powers of piss (weird saying that one! ) but it did have some issues due to the increased HP. If one had the time, money, know how, equipment and inclination it could be a worthwhile proposition for the TM250. A TM325 (but stroked and preferably 360ish) in the pre'75 open as opposed to the TM400 widowmaker could be just the ticket a ticket to what I don't know but she'd be very different  

RL325 parts catalogue here  http://www.crooks-suzuki.com/index.php?p=76

I mentoned to Leith already but notice they also have 2 flywheel weights. 1 either side of the crank. Std flywheel magneto on left but also the disc in behind the primary drive gear on the right. Loads of other differences too...

[Doc]

  found a pic of my half hearted ERL185. I remember now, I moved the footpeg back and up and made sure the kickstart cleared it but alas it smacked into the brake lever and I couldn't/wouldn't think of a solution, then a real RL rocked along and I lived happily ever after