Wierd problem

[Sgt. Hobo]

Ok so bike revs fine in neutral with no throttle , but then add alot of throttle and it bogs down alittle throttle and its fine.
Wen i put the bike in gear it bogs down no matter what till it gets up high in rpms, or if i only use about 1/8 of a turn on the throttle(aka accel really really slowww)
ANY IDEAS?

[2Smoke]

Sounds like its running lean. What bike is it? Could be an air leak somewhere, if its a 2 stroke then I'd suspect crank seals. When did it start doing this?
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[gixxersixx]

is it "boging down" at the same revs in each gear? if not could be timing, if it is the same revs in all gears then carb/fuel settings, but check your plugs, could be dirty or porcelain cracked
What bike is it?
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[the grim reaper]

I'd say your exhaust is full of coke and crap, if it's a 2 stroke.

Cheers

Grim
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[Sgt. Hobo]

its 1986 a 4 stroke Track Daelim h100 i think someone said it similiar to alot of hondas
could th small leak from te carb seal not being any good do this, because it has an ocassion drip

[finpos]

Don't suppose you know if the carb is fitted with a thing called an accelerator pump? it's a thing which is designed to richen the mixture as you open the throttle, to stop the kind of effect you're describing.

that or it's running very lean to begin with, which could be the adjustment or an air leak.

Any markings on the carb??

finpos.

[Sgt. Hobo]

its a mikumi carb a single of course
is there anyway to start the bike easier when its cold, my poor legsare tired from kick starting and bumping it. plus it takes like 10 minutes to get it to start lately any idea why that is ?

[hmmmnz]

if you do have a air leak in one of the boots. that would defently cause what your are describing.
while the bike is running get some wd40 and spray at the carb boots.
both before the carb and between the carb and the engine.
if the bike changes its revs at all then the boot has a hole and will need to be replaced(or if your budget you could always put a dab of silicone over the leak... thats only a temp fix though)
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Wiring Diagrams BIDNIP it bitches

[Sgt. Hobo]

what are the boots. i am brand new to this i now were it connects to engine and were it connects to carb but what are the boots?

[finpos]

Does it look like this:

https://www.siue.edu/~rsutton/SR/mikuni.htm

special attention to the parts labeled "accelerator pump" and "accelerator pump linkage"

finpos.

[Sgt. Hobo]

nope not at all doesnt have that accelerator shit on there

[finpos]

That's a shame because it's really easy to fix

Next best guess would be general lean running then, which would also explain why it's hard to start.

finpos.

[Sgt. Hobo]

So how can i fix the problem im tired of ick starting for 5 minutes before it even decides to turn over

[finpos]

I would have thought you'd need to look at the choke mechanism on the carburetor for a start, make sure that works. If the bike was, in fact, running lean, then running it with the choke on will alliviate it to some extent.

One thing you can try is to put a few CC of petrol into the airbox before you try to start the bike. Can't recommend it as a long-term solution, but it will temporarily richen the mixture (which is the choke's job really)

NB - with the choke on, don't touch the throttle.

finpos.

[stinkwheel]

I will say this only one more time. Have you checked the ignition timing yet?

From your previous posts I think your bike is running too far advanced.

[finpos]

He makes a good point. Don't muck about with the carbs until you are certain the ignition is working. I didn't realise the bike had adjustable timing

finpos.

[stinkwheel]

[gsxrpeak]

[finpos]

[Pete.]

SGT Hobo where are you, perhaps someone could look at it for you.

Post some pics of the carb, the bike etc.

[stinkwheel]

He's in the US.

Here is the first thread:
https://www.bikechatforums.com/viewtopic.php?t=96489&highlight=

This is the thing I thought looked like a fucked condenser:
https://www.bikechatforums.com/files/109089415_349880536_0.jpg

And this is the engine:
https://www.bikechatforums.com/files/109120423_349985366_0.jpg

[Sgt. Hobo]

Ok so this is what is on the side of the motor now how do i check the ignition timing?

[finpos]

Sgt Hobo:

If there's one thing more shonky than your bike, it's your camera. I can't make that out at all! Try a close up

finpos.

[Pete.]

First you should replace the points and the condenser. They are cheap, and it will be easier than trying to clean the points up.

Fit the new condenser. Fit the new points too then you have to adjust the points gap. You must do the points gap before you try to adjust the timing, because the ignition timing is affected by the gap. Firstly find out what your points gap should be from the manual. Remove the flywheel cover and turn the flywheel until the points are fully open. Adjust the gap by slackening the screw and using a flat-blade screwdriver in the notch to turn the body of the points and open/close the gap. Check with a feeler gauge after you tighten the screw. Normally, setting the gap will put the timing back to stock (because the timing plate won't have ever moved) but if you want to check/adjust the timing then follow these steps:

You need a small 12v bulb in it's holder with 2 wires coming off it. Check it works on the battery. Fix one wire to the engine casing, the other connects to the wire coming off the points (which should still be connected too for the test). With the ignition on, and the points closed, the bulb will be dim. With the points open the bulb will be bright. Now look on the flywheel for a "F" mark. This is called the static timing mark and it should line up with a mark on the casing. As you turn the flywheel the bulb should go from dim to bright at the "F" mark. It if doesn't you have to adjust the timing backplate by loosening the screws and using a screwdriver in the slot. You must do the points gap first, the timing afterwards.

[Sgt. Hobo]

So could the rectifier being broke make the bike not start because its been broke the whole time but sometimes the bike would run and some times it wouldnt

is there anything i can do to by pass the rectifier just so i can get the bike to run because now its just not starting