Just bought an 86 and took it out today. When I was riding it suddenly shut off and wouldn't kick over. I let it sit for about 20 minutes and tried to bump start it. It fired right up and kicked over everytime after. I've tried searching this problem and found a few thing leading me to believe that it's time for a rebuilt. I was told it was on it's second bore and it was rebuilt last year with less than 6 hours riding time on it. Should I pull this motor out and get it ready for a rebuild or could something else have cause the bike to shut off? Thanks for any help you can give me. If you want a mod list, let me know and I will post up what I was told about it.
86 Engine REbuilt needed?
Wolverine21
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Just bought an 86 and took it out today. When I was riding it suddenly shut off and wouldn't kick over. I let it sit for about 20 minutes and tried to bump start it. It fired right up and kicked over everytime after. I've tried searching this problem and found a few thing leading me to believe that it's time for a rebuilt. I was told it was on it's second bore and it was rebuilt last year with less than 6 hours riding time on it. Should I pull this motor out and get it ready for a rebuild or could something else have cause the bike to shut off? Thanks for any help you can give me. If you want a mod list, let me know and I will post up what I was told about it.
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13,288 Posts
QUOTE(Wolverine21 @ Feb 13 2011, 02:39 PM) index.php?act=findpost&pid=60958Just bought an 86 and took it out today. When I was riding it suddenly shut off and wouldn't kick over. I let it sit for about 20 minutes and tried to bump start it. It fired right up and kicked over everytime after. I've tried searching this problem and found a few thing leading me to believe that it's time for a rebuilt. I was told it was on it's second bore and it was rebuilt last year with less than 6 hours riding time on it. Should I pull this motor out and get it ready for a rebuild or could something else have cause the bike to shut off? Thanks for any help you can give me. If you want a mod list, let me know and I will post up what I was told about it.
Check all your electrical connections; Coil, Stator ground, CDI, Stator, Wire Harness, Plug, ect, first…
Then I would check your fuel delivery; float bowl height and clean the carb out completely. I would also pull the petcock & fuel lines off the tank; clean & inspect.
You should also pull your head & cylinder off the engine and inspect the piston, rings and cylinder for wear and time on engine.
I would not say you need an engine build until you check everything out first, then you can determine what needs to be done.
Carlos.
Check all your electrical connections; Coil, Stator ground, CDI, Stator, Wire Harness, Plug, ect, first…
Then I would check your fuel delivery; float bowl height and clean the carb out completely. I would also pull the petcock & fuel lines off the tank; clean & inspect.
You should also pull your head & cylinder off the engine and inspect the piston, rings and cylinder for wear and time on engine.
I would not say you need an engine build until you check everything out first, then you can determine what needs to be done.
Carlos.
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Maybe I misunderstand you or you misunderstand me, but when I said that it wouldnt kick over, I meant it was kicking free, but it wouldn't start. Just wanted to make sure we're on the same page. I'll try to grab pictures tomorrow if I can tear into it. Thanks guys.
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Yup, could be a possibility...taking the head/cylinder off and having a good look at the piston/rings & sleeve is the way to go..
Wolverine21: pics will go a long way to helping you out, looking at your carb, electricals and engine is what I (as well as others) would personally do if I was working on your 250R...start with taking a good look at your piston/rings & cylinder.
Carlos.
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I'll try to get the head off tonight. I didn't have much time to mess around this morning, but she started right up. I think there is a block in one of the fuel lines or the carb. I'll be sure to take the head off when I have a chance and will be sure to take pictures to show. Thanks for the help.
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Can a head gasket cause this type of problem? Should I change the head gasket when I pull the head anyway? Thanks
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QUOTE(Wolverine21 @ Feb 14 2011, 06:37 PM) index.php?act=findpost&pid=61045Can a head gasket cause this type of problem? Should I change the head gasket when I pull the head anyway? Thanks
If it stopped running, then re-started after 20 minutes, and has continued to keep starting and running normally, sounds like an intermitting electrical issue or possibly just some dirt or foreign matter that went through your carb or fuel system…
Compression check & checking your piston, rings and sleeve is verifying it was not a seizure or any damage occurred. I don’t think a bad gasket would have caused it to stop running and then keep running & starting normally.
I always replace all gaskets (including o-rings if any) when pulling the head or cylinder, however; in a pinch, you may be able to reuse your gaskets if they are not torn and with sealant like ThreeBond 1211.
Carlos.
If it stopped running, then re-started after 20 minutes, and has continued to keep starting and running normally, sounds like an intermitting electrical issue or possibly just some dirt or foreign matter that went through your carb or fuel system…
Compression check & checking your piston, rings and sleeve is verifying it was not a seizure or any damage occurred. I don’t think a bad gasket would have caused it to stop running and then keep running & starting normally.
I always replace all gaskets (including o-rings if any) when pulling the head or cylinder, however; in a pinch, you may be able to reuse your gaskets if they are not torn and with sealant like ThreeBond 1211.
Carlos.
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Tracked the problem down to a blocked fuel line. Thanks for all the help. I'll be ordering a head gasket so I can check the piston before it sees alot of riding time this summer. Next task is jetting any clue what to start with? It seems that the quad just gives up on the top end and isn't putting out as much power as it should. It's got a trx5 pipe and stock gearing so I don't think it can be something as easy as that. Could jetting be causing this problem. I pulled the plug and it was black as can be, but I think this was caused from flooding it when it shut down and I tried to start it back up. I have yet to ride it with the new plug. Should I just jet it using the plug color or could any of you help me out with a place to start and work off of? Thank you guys.
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QUOTE(Wolverine21 @ Feb 15 2011, 09:43 AM) index.php?act=findpost&pid=61081Tracked the problem down to a blocked fuel line. Thanks for all the help. I'll be ordering a head gasket so I can check the piston before it sees alot of riding time this summer. Next task is jetting any clue what to start with? It seems that the quad just gives up on the top end and isn't putting out as much power as it should. It's got a trx5 pipe and stock gearing so I don't think it can be something as easy as that. Could jetting be causing this problem. I pulled the plug and it was black as can be, but I think this was caused from flooding it when it shut down and I tried to start it back up. I have yet to ride it with the new plug. Should I just jet it using the plug color or could any of you help me out with a place to start and work off of? Thank you guys.
Sounds like your set up is pretty much stock except for the TRX5 pipe, none of us can nail jetting for you over the internet, however; here is a place to start:
Main: 170-176
Pilot 56-58
Needle: DGH, CEJ or CEL
Needle: 3 rd clip down
Airscrew: 1 ¾ turns out
Should be on the Rich side, perform plug chops in the gears you use most (3-4-5th)…check plug color and jet accordingly.
Carlos.
Sounds like your set up is pretty much stock except for the TRX5 pipe, none of us can nail jetting for you over the internet, however; here is a place to start:
Main: 170-176
Pilot 56-58
Needle: DGH, CEJ or CEL
Needle: 3 rd clip down
Airscrew: 1 ¾ turns out
Should be on the Rich side, perform plug chops in the gears you use most (3-4-5th)…check plug color and jet accordingly.
Carlos.
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62 Posts
Same exact thing happened to me this weekend. I thought I blew the bike up as soon as it happened but the bike still had plenty of compression. I guess I'll start by checking the lines and carb.
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