Wolds Alpacas

1 hour ago, 06kfx440 said:

Run a plug chop to confirm your on point with tuning you carb. Sometimes that's the only way to tell.

Sent from my SM-N920V using Tapatalk
 

Forgive my ignorance 06kfx440 - but what is a plug chop?

1 hour ago, Frank Angerano said:

It’s a carb adjustment most likely.  Unless the smoke is blueish? Then it would be burning oil. If not then it’s just a matter of dialing the carburetor in.  Try adjusting the needle on the main jet if needed but I would think it’s more of an air fuel adjustment.  Be sure the choke is opening and closing properly.   If it’s not opening all the way the carb will act up.    

Thanks for your continued support Frank - no, it is not blueish.  It is really in a bad place that adjuster so will have to spend some more time...

Well I got a small flat blade screwdriver now to adjust the mix but something is not right.  At a certain point I seem to get a lot of white smoke (odd as reading about that most answers refer to coolant mixing in - this is air cooled!)  Anyway, if I run it full throttle it bogs down or just runs rough - it seems to lack power, just seems to run out of steam and I can't get it to run smooth.....

A quick update...

I sprayed carb cleaner around the hoses etc with no problems detected and so took the carb apart again and did a slight adjustment to the float and now fuel is running in much better.  I tried to make a tool to adjust the mix but it was pretty useless but I did set it about 1 3/4 turns out from the pinch point and it certainly runs a whole lot better so I have ordered up a small set of flat bladed screwdrivers that fit onto a 1/4" socket set - https://www.ebay.co.uk/itm/332842831621?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 which I think will allow me to get in there.  Once I get them I will fine tune that mix screw and let you know how I got on.

Thanks

This is a thread I will follow with interest as I too have recently bought a King Quad 300 and it is in need of some attention due to rough running.  I will be stripping the carb out in due course and cleaning in an ultrasonic cleaner so will let you know how I get on as well (after sorting out another quad)

Thank you Frank - that is on my carb! - why the hell do they put the darn thing in such a hard to get to place! - That EZ Just screw mod seems ideal but there is nobody in the UK doing them directly as far as I can see at the moment. 

4 minutes ago, Frank Angerano said:

2-1/2 is where I start. But I’ve leared over the years that the smaller engines like my 220 bayou or my 250 bear tracker like to run at 1-3/4 turns out. My old bayou 400 was -2-1/2 turns out and and a hair further to be perfect.  

Have you checked for any rev limiters on the bike ? Does the throttle have any wiring going into it ?

Thank you JacobSlabach for your input.  There are no rev limiters or wiring into the throttle Frank.

Tomorrow I shall spray some carb cleaner around the connections to see if there is a leak.

I have a Suzuki that is bogging down and backfiring as well which I recently bought which sounds like the same problem!

Thanks all.

Just now, Frank Angerano said:

It has to have the fuel air fuel screw. Some of them have a plug over them that has to be removed.  Weather drilled out or popped out. It should be on the bottom of the carburetor look for a round metal plug 

Thanks Frank - I will check tomorrow!  

1 hour ago, Frank Angerano said:

The ultrasound cleaner is great but will not get everything cleaned.  You may have to pull the carb off again and clean it out using a small piece of wire to get inside the jets. Use air to blow out all the orafaces. The float may be getting stuck and that may be your reason why fuel is not getting up into the carburetor.  Did you remember where the air/fuel screw was set at before you broke it down? If not set it at 2-1/4 turns out from a snug position. And adjust from there either in or out, which ever way the bike runs better while the bike is running and the air cleaner is installed. You may have to figure out a way to turn that air/fuel screw or make up a small angle screwdriver while the bike is running.   

 

Lastly what made you think it was the carburetor in the first place? What pointed you in that direction ? Had the bike been sitting ? 

Thank you Frank, I did inspect the jets and could see through them properly which I could not before the ultrasonic bath.  This has a Mikuni carb and I am sure I read somewhere that they don't have a air/fuel mix screw - it is preset and been the cause of problems for other people..

3 hours ago, 06kfx440 said:

That's to much fuel. Does your carb have an air fuel mixture screw? If so, turn it in 1/2 turn. If not then maybe something isn't set right in the carb. Or again. A vaccume leak. Check everything over.

Sent from my SM-N920V using Tapatalk
 

Thanks for your feedback 06kfx440 - it is a Mikuni carb which I am led to understand does not have a mixture screw.  I need to look at the whole setup again in daylight.  I did see a video suggesting to check the inlet manfold which is rubber and always suspect on older machines. 

Thanks for the reply 06ofx440 - I think it is the exhaust.

Hello all.  I have just stripped down the carb on my YFM225 as it is not running right.

I put it in the ultrasonic cleaner for half an hour and it has done a good job.

Nice clean jets but when I go full throttle it backfires, and there is a lack of power.

It also does not seem to take fuel in properly - it comes out the petcock ok so it is running freely enough, but it is not drawing into the carb.

If anyone has any ideas I would be very grateful.

I have the manual now but there is no clutch cable - adjusted the setting as per the manual. but it still jerks sometimes into gear and the actual gearchange and getting back to neutral is pretty hard.

So, I replaced the exhaust gasket and it is MUCH better!

I replaced it with a copper one - I think the old is a different compound.

Here is the old one....

(By the way, when I find the problem on anything, I do try to post on forums as I am so fed up with seeing forum posts with a problem but no solution from the original poster!)  - I think it is rude to not show what the solution was as it helps no-one if there is no feedback on an issue!

Well nobody has said I can not link to a video I made on the noisy exhaust, so here it is if anyone has anything to add to what has already been said....

I bought them from Ebay - https://www.ebay.co.uk/itm/132341756871?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

Hello Frank,  I have actually just bought a couple of them and will be changing it out to eliminate it.  Thanks for your suggestion.

Am I allowed to link to a video showing the problem?

Thanks for the information.

Thank you both for your replies - I am waiting for a manual to arrive.  The bike was registered in Feb 2004, maybe it is a 2002?

Thank you.

Hello - I have just had delivered my 2004 registered King Quad 300.

The gear change is pretty fierce.  Pretty hard to get into gear from neutral on the foot pedal and when I select reverse on the hand lever, it jumps into reverse with a hell of a kick.

I am waiting for a service manual to arrive, but in the meantime, has anyone any suggestions please?

Thank you.

No, this is the stock exhaust.  It did not have the baffle in so that cost about £80! Did not seem to have any affect though.  Still sounds like a bloody tank!  I will have to take it off I think and re-fit when the weather gets warm enough to be outside!  Thanks for your reply.

It is a 2004 registered 300.  Thanks for your reply.

No, I have disabled the kill switch as that has caught me out before as well!    Thanks for your suggestion.

Yes, that was OK - plus, trying a DC CDI I had hoped would have ruled out any other problems in that area.  Thanks for your reply.

I have just ordered a Suzuki King Quad 300 which should be here this week - it is described as "with slow running needing attention"  I am as a matter of course going to put a new spark plug in, change the oil and oil filter and blow out the air filter with compressed air - anything else I should consider?  Also, the headlights do not work - I want to change them out for LED ones anyway though. 

I have a Yamaha YFM225 which sounds really noisy exhaust wise.  It had no baffle so I bought and installed that but it seemed to make no difference.  There are no leaks from the manifold or exhaust but the damm thing just sounds  so loud !