wr360 fouls plugs blows smoke

[pcahbrown]

My wr 360 1995 started running rich . i checked the jetting and that was OK, on the lean side , the bike lacked midrange snap of which it used to have when i first got it. i went out for a ride and rode for about 2 hours with the bike running richer and richer until it was gurgling badly and blowing a lot of smoke and it then died. i checked the spark plug and it was covered in fuel . After cleaning the plug it wouldn't start and i had a very weak spark. I got the bike home fitted a new plug and it started straight away but once again started running rich and bogging down with heaps of smoke out of the pipe but straight away this time . I have replaced the float bowl valve seat and valve and also replaced the crank case bearing seal . Would a fouled or worn out stater be the cause not producing a strong enought spark to ignite all the fuel. . need help have no ideas left to try.
paul

 

[CMYVA]

Sound Like It Might Be The Float Needle Valve? Just Guessing!

 

[pcahbrown]

No it is not that . as i said i have repaced the float seat and needle. but
thanks for your reply
paul

 

[cujet]

Maybe bad reed valves. If they leak (air flows backwards) the double carburation effect occurs. This can cause an unusually rich condition. Still, I suspect a carburation problem (such as a sinking float) or a leaking crankshaft seal.

One quick and dirty way to determine if it is a carb float level problem is to shut off the fuel petcock while riding gently, (careful not to run lean with a load). If the condition corrects itself for a while, before running lean, the carb is likely the problem.

The stator on that bike is simply a winding. All the electronics are external. I rewound my stator due to mechanical failure. There is 22,000 turns of 0.009 in wire (I am not certain of the dia, been a while) The wire is so thin that it is unlikely to partially fail. Also, the OEM windings are high quality and neatly done.

Chris

 

[pcahbrown]

tested

I have had my complete electrical system sent away to be tested and it is not the cause of my problem . i have a 20 kw spark so it's not that. we have a new high octane petrol here in Australia which is 98 octane which i have been running in my bike.. could additives in the petrol cause the carby to erode . I know petrol companys are putting awful chemicals into petrol these days.

 

[Vince Stokes]

What carb do they come with,maybe the needle and needle jet are warn,if its a delordo then the
choke plunger rubber on the tip hardens and wount seal,they can be flipped over and pushed back in
very fiddly job .Are you using Optimax,if your bike is a bit rich then this will fowl plugs,did on my
Laverda. Dump the fual in the tank and replace it,I got some bad fual once and spent months tiying
to get a Husky Auto to start,all of the above is simple to try,you have done the hard stuff,where in
OZ are you.
Vince

 

[pcahbrown]

BP's 's new petrol

the carby is a mikuni TMX 38 mm and the petrol is the new BP ultima.
i live in the sunshine coast QLD

 

[MB_Austin]

fouls plugs

I'm very interested on this topic. My 96 kdx200 is doing something similar. It has very few miles on it, but I'm worried it might be the crank case bearing seal. I plugged the intake with a rag when cleaning the filter once, forget to remove the rag before replacing the filter, and started it like that. After it quit running, I tried kicking it over a bunch before figuring out about the air obstruction..

In addition to smoke of a bluish white tint, the bike actually spits droplets of oil out of the pipe.

Is there a way to determine if that seal is bad without taking the engine apart? Can you even tell if it is bad after you do take the engine apart?

 

[johne4]

A leak down test would tell if you have a leaky seal .

 

[Vince Stokes]

Sorry I only have expereance with Delordos, I might suggest a Google on Jaydee Motocycle,
there in Victoria,give them a call,very cluey and helpfull.
Vince

 

[Vince Stokes]

Had another thought,have you had a look in your muffler,
it might be choka with spooge?
Vince

 

[pcahbrown]

jaydee's

I have been in contact with Jaydee,s and there head mechcanic put his life on a blowen crank seal which it isn't . i have sent the carby to the mikuni importer in SA so maybe the immultion tube is blocked or something . I have also be talking to R and D in sydney .

 

[Ian Brock]

Rings?

When my RMX 250 began to run rich I knew that it was time to replace the rings/piston. This would often happen if I got stuck in a bog etc and overheated, but did not necesarily boil the motor.

The piston rings would lose their tension and the engine would run blubbery and rich. New rings and the power and crispness would return.

The wet spark plug could be the carburetor but may also indicate poor piston ring sealing. Good luck.

 

[Vince Stokes]

Fast running out of straws and experts.
Vince

 

[cujet]

I still think it is a carb problem. I took the crappy Mikuni off my Husky right away, as it was not capable of running correctly. I installed a 39mm Kehin PWK, with fantastic results.

Chris

 

[pcahbrown]

at a complete loss now

My carb came back for the carb specialist today and he was unable to fault it , all jets ok float bowl level also OK . so now i have done everything except split the case to see if the gasget has let go between the crank and gear box . is there a dye or something to make the trans oil smell to see if that is the problem before going through the process of splitting the cases. I started the bike after putting the carby back on and it billows smoke out the exhuarst. any ideas anybody
thanks Paul
PS Please read my initial post for a outline of my bikes problem

 

[pcahbrown]

run out of ideas husqvarna 360

Husqvarna not happy.wr 360 96 model.billow smoke and fouls plugs. i checked the jetting and that was OK, on the lean side , the bike lacked midrange snap of which it used to have when i first got it. i went out for a ride and rode for about 2 hours with the bike running richer and richer until it was gurgling badly and blowing a lot of smoke and it then died. i checked the spark plug and it was covered in fuel . After cleaning the plug it wouldn't start and i had a very weak spark. I got the bike home fitted a new plug and it started straight away but once again started running rich and bogging down with heaps of smoke out of the pipe but straight away this time . I have replaced the float bowl valve seat and valve and also replaced the crank case bearing seal . I have had the carb checked all OK and the complete ignition tested again all OK . new rings and reeds still didnt fix it. my last option is to split the cases to see if the gasget hase let go between the crank and trans .Is there a dye or something to make the trans oil swell to see if it is getting into the crank .
thanks Paul.

 

[nickyd]

how is the pipe and more importantly the silencer? something blocking the silencer? is it re-packed?

 

[rmxtwofitty]

I had an rmx that did the same thing for months. If your sure your right side crank seal is good, then I would say it's one of two things: your ignition(stator), or on my bike I had a spark arrester that was so full of junk it was making the bike run way weird. If you have a silencer with a spark arrester I would just take it off and run it up the road to see if its any better. Dont piss off the neighbors. As far as the trans leak i'm not sure ow to check for that. Good luck.

 

[Studboy]

If your crank seal is sucking oil, you will be able to tell by measuring the amount of oil between changes. If you are using a significant amount, you probably have a bad seal.

 

[reelrazor]

What studboy said applies to a leak between the trans and crankcase too. Watch the level. Make sure your transmission vent line is clear too.

 

[jmics19067]

seal up the intake and exhaust withe the piston at bottom dead center(ports open) put 5lbs of air pressure in thru the spark plug hole and see if air comes out the transmision breather. MIght be a pain in the neck some afternoon getting all you need to do a leak down test but it is an invaluable tool to avoid having to split the cases when you don't have to.

 

[Vince Stokes]

Drain the gearbox and refill with a measured amount, go for a
spin and drain and measure the amount that came out.
There is usually 2 plugs,racing and putting,recommended for
Huskys, what plug is in it,how long have you had the bike and
did it run well for a while,how many hours on the motor,is the
compression good,I hear 360 take a lot of effit to kick over, if its easy to kick compressions down,how sudden did this problem appear,is it wear and tear,or did it just happen.
There is a logical reason why,you just have to find it.
Good luck Vince

 

[pcahbrown]

unable to ride to much smoke

i cant take the bike for a spin as it billows so much smoke it wont rev out . new rings new reeds , has a decompression head from R and D .
if you read my initial post it goes into more detail as to how it started.
thanks for help
Paul

 

[pcahbrown]

unable to check oil level

the bike billows smoke so badly that it wont rev out enought to take it for a ride without fouling the plug and stopping.so i can't see if the oil level is going down. there is black oily slim pouring out the exhaust header and my hand get splatted in the same stuff if it put it behind the silencer . but is it trans oil of excesive unburnt fuel.