2 stroke run in

[15ellerayn]

I need advice on the best way to run in a two stroke after a rebuild bike is a honda mtx50 and it runs sweet I've heard people say half throttle for 600 miles I've heard people say when it's warm throttle it all you want. What's the right way ?
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15ellerayn

[RhynoCZ]

Does it have a rev counter? If so, don't exceed 60% of the rev range for a while. That should do it.

EDIT: You could also read the manual.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[15ellerayn]

Thanks
Ps I could've got the manual but it would be like £10 on eBay don't need that when there is 100s of experienced bikers on here 😉
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15ellerayn

[RhynoCZ]

Check this thread: https://www.bikechatforums.com/viewtopic.php?t=140295
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[_Iain_]

[MCN.]

It's always good to seize a 2T when running in in my experience, just get it hot enough for a gentle nip. Then complete the running in period as normal. It seems to result in good power and also makes them immune from heat seizing once run in.

[P.]

[15ellerayn]

I could've googled it but it's not really too specific on who is giving the information just some 3rd party website that's always helpful. As for resale value , it's got two engines one is a 6 speed jap import there is 5-6 of these bikes in the country to my knowledge 2 of which have a 6 speed in them. if it was a heap of China crap maybe I'd be a little more worried about price decline.. I'm not too worried I think if the time comes to sell up she will definitely give me back what I owe her.
Ps I see you've got a ktm duke how's the electrics ? I've heard of the 125s re setting themselfs and even one or two of a dropped vavle 😁
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15ellerayn

[_Iain_]

[15ellerayn]

I agree they're duke 125 and probably others by ktm are shite but maybe that's just because all I hear is the bad side how's your bike then ?
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15ellerayn

[_Iain_]

[15ellerayn]

I know they're austrian that's all I need to know. If it didn't come out of Japan or Germany in my opinion it's not worth a penny. I'm not the one going off topic you didn't really provide much help did you mate. Go on tell me how jap bikes aren't all that go for it doesn't bother me Im not the one riding a China bike
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15ellerayn

[15ellerayn]

I just wanted to know your experience with ktm but judging by your reply I'm guessing it's not too good.
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15ellerayn

[_Iain_]

[15ellerayn]

It'll be a while before the bike is finished but when it is You're on for that offer my friend £5 says Japan tops China
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15ellerayn

[-]

If you have the time, probably the most important thing you could do to help the run in procedure is to run the engine through 5 or 6 heat cycles.

On the stand and under no load, just blip the throttle until it gets up to temperature then switch off and let fully cool down. Repeat 5 or 6 times before riding.
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TZR250 2MA road, TZR250 1KT road, TZR250 2MA race, TDR250, YZF-750R Boost colours.
Jaguar S Type 3.0 V6 Sport R, VW Transporter T5 GP LWB Shuttle 140ps DSG.

[stevo as b4]

Never belived in no load heat cycles for engine's. How does it help the run in process?

I quite like the 2stroke MX'er suggested break in procedure.
One tank of slightly oily pre-mix, warm up bike to normal temp, and then 2-3gentle practice laps of the track, before hitting it!

I'm also very wary of these people with tuned strokers with big capacity engine conversions, who do 100's of miles of gentle running in, and then seize it straightaway on the dyno taking power runs. If this happens IMO the engine was never built right or set up correctly from day one!

[dangerousdave]

[15ellerayn]

I want to run it in for reliability not for racing so just a standard fuel oil mixture then let it warm up for a mile or two then a few blips on the throttle ?
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15ellerayn

[Scootaloo]

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[caino94]

Let's just say the little argument in this thread was slightly entertaining.

[1198]

[1198]

[Robby]

A 2-stroke running in thread. As many different opinions as there are posters.

A little MTX50 is about the cheapest thing to rebuild that there is. For this reason, don't get too hung up on the perfect run-in, if it fails you can always rebuild it.

There are two schools of thought on running in. One is to do it gently, by the book. These people say that doing a hard run-in will seize the engine.
The other school of thought is to run it in hard. These people say that a hard run-in will let the engine develop more power.
The only thing that both groups agree on is the the requirement to get the engine up to temp (by riding, not idling) before giving it any significant throttle opening or revs.

It is worth noting that whatever method you choose, people only report seizing the engine after working it hard from cold.

From personal experience of running in a geared moped many, many years ago my preference would be to run it in hard. It's fine to say don't take the revs above 50% of redline for 500 miles, much harder when that means spending 500 miles with a top speed of about 22mph.