gears
-
Posts
47 -
Joined
-
Last visited
-
Days Won
1
gears's Achievements
-
1987 YFM 350 Starts on Pull, but just spins on starter, and won't start
gears replied to billyz57's topic in Yamaha ATV Forum
Had the same thing happen with my 400, turns out the starter motor brushes were almost gone. I ordered up a rebuild kit off ebay and put a new brush assembly in the back. Starts right up now. Low brushes and gunk were making it spin too slow to fire up. -
Sounds like you're limited on tools/experience. Does it turn over by itself with the electrical system - when you push the start button does the engine go "rnnn rnnn rnnn rnnn" or do you just hear a "vrrrrrmmmmmmmmmmm" of the starter motor spinning? Does it do anything different with the pull start? Are you certain you have good spark at the plug? (remove the plug, reconnect the sparkplug wire and leave the threaded base of the plug touching the cylinder head, pull/crank it over - you should see a bluish spark). If you have a spark I'm betting that your carb clean is incomplete (pilot jets are virtually impossible to clean without proper tools) I've found that a wire bristle from a wire brush is just about the right size to poke through the orifice of the pilot. Try opening the airbox, removing the filter and spraying carb cleaner or starting fluid directly into the carb while the engine is cranking. If it starts it's definitely the carb. Has the unit been welded on (broken frame repair) or jumped off a booster box? That can kill the stator/pickup assembly.
-
take a reading with a DVOM on your pickup coils (stator). Most fragile part of the electrical system to cause loss of spark. You'll need the manual for what the wires should read as I've forgotten the exact resistance.
-
check your rear axle tube - transfer case seal goes bad, dumps the oil from the lower unit into the boot of the swingarm and fills it.
-
1986 Yamaha Moto 4 YFM228 bogs down under load
gears replied to chuckcnm's topic in Yamaha ATV Forum
Exhaust can be clogged too. Did you mess with the needle's clip setting on the carb slide? Does turning the choke on while riding change anything? See if running it with the aircleaner lid removed changes anything - could be restriction in the intake tract ducts (mouse nest) going to the airbox. -
2 bolts should pull the caliper and you can get the pads out - this is assuming it's an older one with the rear disc and manual caliper (cable activated rather than a modern hydraulic setup).
-
Pick up a rebuild kit (Shindy, Moose, K&L are three brands readily available online), get some wrenches (10mm, 12mm 14mm, 7mm) a GOOD #2 phillips screwdriver, a good straight blade 3/16" screwdriver, a can or two of carb cleaner (Berrymans is good stuff) and some safety glasses. Remove the carb from the machine (2 10mm nuts at the intake and a #2 phillips on the clamp going to the airbox tube). Twist it out the LH side of the machine, use the 12 or 14 to remove the choke cable. Take it to a workbench to tear it down with the screwdrivers. Be sure to wear the safety glasses when you're spraying the carb cleaner 'cause it will always shoot back into your eye.......
-
Glad to hear you're up and running Bobby, we've been doing well - the kids are tearing it up on our little track in the back yard 2-3 times a week. I'm almost caught up enough to delve back into my Kodiak's oil leak!
-
you did put the carb slides back in the right way and not backwards right? Also I thought there was a balance tube connecting the 2 carbs for the choke - if it's sucking air there you won't be able to get it to idle down.
-
95 Big Bear 350 - What is Hi temp brake grease?
gears replied to schmeck's topic in Yamaha ATV Forum
Yeah you just need something to keep the water/dirt/mud from entering the drums and causing your brakes to stop working. The thicker the better - wheel bearing grease is fine. -
Electrical Service information for 2003 Bear Tracker needed
gears replied to Merrixs's topic in Yamaha ATV Forum
these were common to have a bad pickup coil on the stator. Rick's Electrics offers an aftermarket replacement. You'll have to take a resistance reading across the white, green and red wires - something like that. Compare your readings with the manual specs. -
What color are your wires? red should be batt hot, brown is connected to the brown for power with the key on, the black and black with white tracer typically connected to kill it. IIRC. They had a mid-year change, and I had a heck of a time figuring the problem - even had a new OEM ignition switch.
-
Timberwolf / Beartracker / Moto4 Mods ?
gears replied to ShelbyGT660's topic in ATV & Off Road Modifications
I converted mine to front and rear disc brakes and eliminated the 1st/rev lockout so I have 5 speeds in reverse if I want. -
Sounds like the main jet passage is blocked - can you see light through it when it's installed (with the cap and slide pulled out)?
