Question about Yamaha Serow 225 WE Motorcycles
Posted by Anonymous on
Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Faulty main circuit breaker and or connections.
4. Faulty ignition coil and or connections.
5. Faulty spark plug, oil or gas fouled, wrong heat range or service type, wrong gap, loose in the cylinder head, broken electrode or insulator.
6. Faulty spark plug cables, leaking or broken, internal damage check for spark leakage in the dark.
7. Faulty ignition module, switch, CKP, MAP, CMP, sensor and or any connector in the ignition circuit could have corroded, loose, or broken pins/sockets
8. Burnt exhaust valve or air leak in the exhaust system.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
back fire and glowing red exhaust
Xt225 service manual free download
OEM parts for Yamaha
Yamaha XT225R Owner Manual
Posted on Feb 04, 2017
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Posted on Jan 02, 2017
SOURCE: exhaust glows red
sounds like it's running too lean, could be **** in the carb starving it of fuel. remove air cleaner and spray a bunch of carb cleaner in and let it sit overnight, or take carb off and strip it and clean
Posted on Apr 08, 2009
I have a TTR-250 2005 that I bought new. Exhaust has slowly been getting hotter/redder over the last couple years. It quit running and idling smoothly just recently. I used some "Sea Foam" gasoline additive and it helped a little. After talking to guys at the Yamaha shop, the problem is most likely too lean a mixture due to deposits on the needle valve or build up in the carb somewhere. The sea foam did help but I'll be taking my carb apart soon to fix it totally (I hope).
Posted on Nov 10, 2009
Either way too lean, or air intake leak, or the cam timing is out.
Does it help with the choke on?
Not certain of the timing on that model, but at top dead centre there should be some marks on the cam sprockets that will line up with the rocker gasket surface. The previous owner may have changed the timing by a tooth or two to try for more performance .
Posted on May 07, 2010
i had same problem on my serow 225,glowing red pipe no power and running rough rebuilt carb richend mixture tried alsorts ending up reset valves/tappets slightly bigger than spec and hey presto running cooler ,no glowing exhaust and plenty of power. it seems the bike started ok but as it warmed up and things expanded the valves were not shutting properly even though they were set right acording to manual. hope this is of some help to someone cos it seems alot of people get the same problem as i had thanks Eddie T Accrington England
Posted on May 25, 2012
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