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1978 MZ TS250

skoda_norman Global Moderator Posts: 8,449	1978 MZ TS250 skoda_norman @skodanorman
	Oct 2, 2007 22:27:11 GMT Select Post Deselect Post Link to Post Back to Top
	lol at panniers - they are pretty bad like. i've used throw over panniers, but don't trust them. whats to stop them fall off? i prefer to look of fixed ones too. is the headgasget a pretty simple job then?


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TerraRoot Posted a lot Posts: 1,685	1978 MZ TS250 TerraRoot @terraroot
	Oct 3, 2007 12:43:01 GMT Select Post Deselect Post Link to Post Back to Top
	It's a two-stroke. i don't think it can get simpler, no valves, no chains, no belts nothing. I think you have to undo the top engine mount to get the head off, I'm not sure what the engine hangs off tbh. It might need supporting underneath while your doing it. The spark plug may have to come out if you can't raise the head enough to clear the engine bolts/stub thingies (name escapes me right now) What else? have a look in the barrel while the head is off, look for deep score's in the barrel, deep pocket marks in the piston top, check if the ports have a radius on them. If your feeling frisky, whip off the exhaust and look up the port at the piston, that way you can check if there is any blowby on the piston skirt.
	Dirty gritty and on fire the perpetual build thread and blog My Build thread

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hairnet Probably posted too much I AMUSE YOU.....? Posts: 11,000	1978 MZ TS250 hairnet @83golf
	Oct 13, 2007 17:26:27 GMT Select Post Deselect Post Link to Post Back to Top
	throwover panniers very safe - been at highly illegal speeds in france with no problems oxford first highly recommeded - look for forest edge on ebay - same quality kit he does them cheaper than the shops
	2001 HONDA CT110 (NOT RCV)

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skoda_norman Global Moderator Posts: 8,449	1978 MZ TS250 skoda_norman @skodanorman
	Oct 14, 2007 22:10:55 GMT Select Post Deselect Post Link to Post Back to Top
	used some throw over panniers again this weekend. seemed fine. but i prefer the proper ones...they look better.


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skoda_norman Global Moderator Posts: 8,449	1978 MZ TS250 skoda_norman @skodanorman
	Nov 3, 2007 16:46:31 GMT Select Post Deselect Post Link to Post Back to Top
	quite a lot happened recently. used it daily since september. had a few issues which i'll through shortly. currently got a new chain and sproket on order as the current one is knackered and is slipping if you pull away too quickly or rev too much! gah. loads to do in an update though!


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hairnet Probably posted too much I AMUSE YOU.....? Posts: 11,000	1978 MZ TS250 hairnet @83golf
	Nov 5, 2007 23:03:33 GMT Select Post Deselect Post Link to Post Back to Top
	two stroke stink = gas win ;D
	2001 HONDA CT110 (NOT RCV)

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skoda_norman Global Moderator Posts: 8,449	1978 MZ TS250 skoda_norman @skodanorman
	Dec 8, 2007 1:55:06 GMT Select Post Deselect Post Link to Post Back to Top
	wibblepoo, i never did do that update. in Korea atm so can't really do it now. I put a new chain and rear sproket on which stopped that problem. I also put two new tyres on and had two rear punctures. Currently undecided as to whether to take it off the road and strip it down and rebuilt it? Its currently sat in the garage at home and will be used again in March.


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Deleted Posts: 0	1978 MZ TS250Deleted @Deleted
	Dec 10, 2007 18:29:47 GMT Select Post Deselect Post Link to Post Back to Top
	if you have dislodged something in the exhaust then be careful its not changed the mixture making her run lean ... I knew someone took the baffles out of a 2-stroke and cooked it within a few weeks... just havea look at the plug when you get a chance to make sure the tips still a nice brown colour


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skoda_norman Global Moderator Posts: 8,449	1978 MZ TS250 skoda_norman @skodanorman
	Apr 14, 2008 0:56:53 GMT Select Post Deselect Post Link to Post Back to Top
	Sorry for not getting back to you sooner rottie007. Well I dislodged the exhaust about 2000 miles ago and its still running OK so I think it's OK? The plugs always come out looking the same - black. Decided not to change or replace the exhaust because I just love the saucy engine note it produces. Its just so good! Had it out today for the first time since going away. Cleaned her up and took her to a show and then went for a ride. She is running well, pull and revving well too. Unfortunately I noticed some rust that wasn't there before. It appears to be trying to eat away the rear swing arm/frame. Worrying really. I'm considering taking it off the road and stripping down, but that'd be a big & expensive job. I don't know. Here are some pictures though. From October 07. Repainted mudguard I fought this nut for about an hour to get it off! November 07. Fitting of new tyres. Front brake: Out with the old: While working in the rain! These photos were taken in a ride out today. Looking quite smart from a distance! Mileage now at 32000. MOT is in July, so planning on using and keeping it going until then!
	Last Edit: Apr 14, 2008 1:02:15 GMT by skoda_norman

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TerraRoot Posted a lot Posts: 1,685	1978 MZ TS250 TerraRoot @terraroot
	Apr 14, 2008 11:15:24 GMT Select Post Deselect Post Link to Post Back to Top
	michelin m45's ftw! black plugs indicate that A) your not trashing it enough B) it's running too rich
	Dirty gritty and on fire the perpetual build thread and blog My Build thread

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mcbodge Part of things Posts: 191	1978 MZ TS250 mcbodge @mcbodge
	Apr 14, 2008 18:22:22 GMT Select Post Deselect Post Link to Post Back to Top
	Nice one. Read Jennings' book. port and polish barrel. Re-shape/size ports if you're brave Can you get an expansion chamber exhaust for them? If not, graft one on from a different bike.


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skoda_norman Global Moderator Posts: 8,449	1978 MZ TS250 skoda_norman @skodanorman
	Apr 14, 2008 19:35:25 GMT Select Post Deselect Post Link to Post Back to Top
	By running too much, is that too much two stroke oil in the mixture? mcbodge - port & polish barrel? How? Is it explained in the book? Expansion chamber exhaust - I'm not sure. You can get German performance exhausts for them? Whats an expansion chamber? Rob - the noob


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mcbodge Part of things Posts: 191	1978 MZ TS250 mcbodge @mcbodge
	Apr 14, 2008 20:40:33 GMT Select Post Deselect Post Link to Post Back to Top
	Porting and polishing is to help the gas flow through the engine. Re-sizing and shaping the ports is equivalent to changing the valve timing. Basically, properly proportioned expansion chamber exhausts send timed pulses back and forth in the exhaust ,aiding cylinder filling and preventing un-burnt gas mix going straight through. If you read up on the basics of two strokes and then that Jennings book you'll find better answers. I bet there is a lot of information on MZ tuning. pigeonsnest.co.uk/stuff/mz/mzpage.html www.rzt.de/produkte/41/40049/
	Last Edit: Apr 14, 2008 20:47:55 GMT by mcbodge

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mcbodge Part of things Posts: 191	1978 MZ TS250 mcbodge @mcbodge
	Apr 14, 2008 20:41:37 GMT Select Post Deselect Post Link to Post Back to Top
	Too rich = not enough air in or too much fuel.


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TerraRoot Posted a lot Posts: 1,685	1978 MZ TS250 TerraRoot @terraroot
	Apr 14, 2008 21:13:46 GMT Select Post Deselect Post Link to Post Back to Top
	If you have too much two stroke oil it will smoke excessively, it should smoke but not enough to cloud the town as you potter about. I meant rich running by the way of some previous owner putting in (or drilling out) a bigger main jet expansion pipe
	Dirty gritty and on fire the perpetual build thread and blog My Build thread

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hairnet Probably posted too much I AMUSE YOU.....? Posts: 11,000	1978 MZ TS250 hairnet @83golf
	Apr 14, 2008 22:00:42 GMT Select Post Deselect Post Link to Post Back to Top
	norm they race these things so you should get some tips ps i know where theres a rm 250 crosser you can have for 75 quid ;D
	2001 HONDA CT110 (NOT RCV)

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hairnet Probably posted too much I AMUSE YOU.....? Posts: 11,000	1978 MZ TS250 hairnet @83golf
	Apr 14, 2008 22:04:36 GMT Select Post Deselect Post Link to Post Back to Top
	www.bmzrc.org.uk/ there was one in PB but I cant find it
	Last Edit: Apr 14, 2008 22:06:08 GMT by hairnet 2001 HONDA CT110 (NOT RCV)

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mcbodge Part of things Posts: 191	1978 MZ TS250 mcbodge @mcbodge
	Apr 15, 2008 8:34:29 GMT Select Post Deselect Post Link to Post Back to Top



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mcbodge Part of things Posts: 191	1978 MZ TS250 mcbodge @mcbodge
	Apr 20, 2008 15:07:54 GMT Select Post Deselect Post Link to Post Back to Top
	any joy on finding parts?


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skoda_norman Global Moderator Posts: 8,449	1978 MZ TS250 skoda_norman @skodanorman
	Apr 20, 2008 16:53:33 GMT Select Post Deselect Post Link to Post Back to Top
	I've not had a proper look yet. I'm worried about the corrosion and very seriously considering stripping it and sorting it out. But, that would mean having to stop talking about doing it, and actually doing it!


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