<![CDATA[Oil from Crankcase breather and won't rev out]]>Just imported 1989 dt125r. Now on the road but engine cuts out at about 8k revs. Checked YPVS valve which operated fine. Carb stripped and cleaned all good. However still won't rev out. Very occasionally it will rev almost to redline but mostly it cuts out (stutters). It's also kicking oil out of breather. Any suggestions

]]>https://dt125r.co.uk/topic/1895/oil-from-crankcase-breather-and-won-t-rev-outRSS for NodeFri, 15 May 2026 04:19:38 GMTSat, 30 Mar 2019 18:33:26 GMT60<![CDATA[Reply to Oil from Crankcase breather and won't rev out on Sun, 31 Mar 2019 17:45:25 GMT]]>Reassemble is simply the reverse of the disassembly procedure.

That's a gem from Haynes and about ad helpful ad an ashtray on a motorcycle ;)

]]>https://dt125r.co.uk/post/20252https://dt125r.co.uk/post/20252Sun, 31 Mar 2019 17:45:25 GMT<![CDATA[Reply to Oil from Crankcase breather and won't rev out on Sun, 31 Mar 2019 16:56:52 GMT]]>@NINJA said in Oil from Crankcase breather and won't rev out:

@Barrelman Grab yourself a Haynes manual off ebay dude, there worth their weight in gold. ;)

Reading it as we speak

]]>https://dt125r.co.uk/post/20245https://dt125r.co.uk/post/20245Sun, 31 Mar 2019 16:56:52 GMT<![CDATA[Reply to Oil from Crankcase breather and won't rev out on Sun, 31 Mar 2019 11:33:26 GMT]]>@Barrelman Grab yourself a Haynes manual off ebay dude, there worth their weight in gold. ;)

]]>https://dt125r.co.uk/post/20236https://dt125r.co.uk/post/20236Sun, 31 Mar 2019 11:33:26 GMT<![CDATA[Reply to Oil from Crankcase breather and won't rev out on Sun, 31 Mar 2019 11:11:39 GMT]]>Thanks for replies. Now to work out how to do that. Always learning

]]>https://dt125r.co.uk/post/20234https://dt125r.co.uk/post/20234Sun, 31 Mar 2019 11:11:39 GMT<![CDATA[Reply to Oil from Crankcase breather and won't rev out on Sat, 30 Mar 2019 23:15:31 GMT]]>@Barrelman I concur with Dan. ;)

]]>https://dt125r.co.uk/post/20224https://dt125r.co.uk/post/20224Sat, 30 Mar 2019 23:15:31 GMT<![CDATA[Reply to Oil from Crankcase breather and won't rev out on Sat, 30 Mar 2019 19:15:41 GMT]]>@Barrelman said in Oil from Crankcase breather and won't rev out:

Just imported 1989 dt125r. Now on the road but engine cuts out at about 8k revs. Checked YPVS valve which operated fine. Carb stripped and cleaned all good. However still won't rev out. Very occasionally it will rev almost to redline but mostly it cuts out (stutters). It's also kicking oil out of breather. Any suggestions

Bad crank seals most likely

]]>https://dt125r.co.uk/post/20219https://dt125r.co.uk/post/20219Sat, 30 Mar 2019 19:15:41 GMT