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Post by thewiz on Jan 30, 2017 19:09:00 GMT -6
Factory carb ran good after drilling out the left carb jet. I thought it was a carb issue until i bought 02 ex500 carbs and pod filters then the same problem occured...left cylinder is not firing. Operating temperature, full choke nothing gets it going until i full throttle it with choke off about 7k it picks it up for a second. Do i need to rejet them? Adjust something? Im lost the carbs ran well when they were taken off.
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Post by joe on Jan 30, 2017 19:56:26 GMT -6
Don't have an answer for you but it's funny you mention this. I had a dead cylinder when i got mine cleaned the carbs, new plugs and solved the problem so i thought. Then on occasion I'd start her up, let it warm up and take it around the block. Sometimes it'd be sluggish (running on one cylinder or maybe missing a bit) then all of a sudden it'd catch and it was like a turbo kicking in. The more i ride it the problem has pretty much gone away now. All i can think of is the old electronics had to 'wake up' a bit.
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Post by joe on Jan 30, 2017 19:57:54 GMT -6
What about switching the coils and see if the other cylinder doesn't fire?
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Post by thewiz on Jan 30, 2017 22:07:02 GMT -6
ive done that i have good spark and compression fresh fuel float and needle are working. its very strange its a head scratcher
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Post by joe on Jan 31, 2017 5:17:06 GMT -6
Valve adjustment maybe?
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Post by thewiz on Jan 31, 2017 11:33:14 GMT -6
Valve adjustment to service manuel spec 500mi ago. Seeing how we increased the jet size to work last time would a jet kit harm the right cylinder if it works perfect right now?
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Post by thewiz on Jan 31, 2017 11:35:59 GMT -6
If it sounds like a coil issue tell me this, what years of ninja/vulcan coils will work for the 454?
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Post by joe on Jan 31, 2017 15:08:00 GMT -6
If you switched the coils and nothing changed its probably not a coil. Could be one of the pickups or possibly ecu. I'm not a veteran bike mechanic so hopefully someone else can offer some better advice.
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Post by joe on Jan 31, 2017 15:17:05 GMT -6
The 'turning over but not starting' thread had me wondering something. He had a problem with it not starting, you and i have had problems with one cylinder not firing. He mentioned the coolant tube that runs into the head leaking. I have the same issue though not real bad. I wonder if coolant is pudding around the spark plug and seeping into the cylinder fouling the plug. Tell me this, do you park the bike on the side stand and is it the right cylinder(if you're sitting on the bike) not firing?
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Post by thewiz on Jan 31, 2017 19:18:31 GMT -6
Its the left cylinder and i use the kickstand
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Post by Blaine on Jan 31, 2017 19:44:37 GMT -6
Its the left cylinder and i use the kickstand Check to be sure no water or coolant sitting around base of spark plug. |
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Post by joe on Jan 31, 2017 20:30:46 GMT -6
I second that. If it looks wet around there try pulling the plug, crank it a few times then put the plug back in and fire it up, that'll blow out any coolant that might have seeped in.
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Post by thewiz on Feb 2, 2017 23:52:05 GMT -6
i gave the left carb a good cleaning and i discovered a spec of dirt in the small jet its running better but a little rough. i have no low end it slowly revs then boom back to normal at about 4k rpm. the carbs are 02 ninja 500 carbs and a set of emgo pod filters, before it was bone stock. i would like the lower end back or is it gone forever?
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Post by Blaine on Feb 3, 2017 6:43:20 GMT -6
i gave the left carb a good cleaning and i discovered a spec of dirt in the small jet its running better but a little rough. i have no low end it slowly revs then boom back to normal at about 4k rpm. the carbs are 02 ninja 500 carbs and a set of emgo pod filters, before it was bone stock. i would like the lower end back or is it gone forever? Cut 3 coils off the top of the diaphram springs.This will reduce resistance in the slides & you wont need as much pressure to raise them. (That you lost with the pods).Your throttle will be much more responsive. |
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Post by thewiz on Feb 4, 2017 15:12:20 GMT -6
i gave the left carb a good cleaning and i discovered a spec of dirt in the small jet its running better but a little rough. i have no low end it slowly revs then boom back to normal at about 4k rpm. the carbs are 02 ninja 500 carbs and a set of emgo pod filters, before it was bone stock. i would like the lower end back or is it gone forever? Cut 3 coils off the top of the diaphram springs.This will reduce resistance in the slides & you wont need as much pressure to raise them. (That you lost with the pods).Your throttle will be much more responsive. can i swap in my stock carb coils or will it just be better to cut the current coils? |
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Post by Blaine on Feb 4, 2017 21:07:59 GMT -6
Cut 3 coils off the top of the diaphram springs.This will reduce resistance in the slides & you wont need as much pressure to raise them. (That you lost with the pods).Your throttle will be much more responsive. can i swap in my stock carb coils or will it just be better to cut the current coils? I think they are both the same length.....(if shorter you can switch them)..If not just cut one coil at a time till you get good throttle response.....# worked well for me......I have seen some people take them out completly.....But that leaves nothing there if the slide happens to stick. |
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Post by thewiz on Feb 11, 2017 15:54:50 GMT -6
The throttle response is back but I have no power on the road until about 6k rpm. Would I need a jet kit on these ninja carbs with emgo pods? I'm pretty sure its an air fuel ratio problem.
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Post by Blaine on Feb 11, 2017 21:58:54 GMT -6
The throttle response is back but I have no power on the road until about 6k rpm. Would I need a jet kit on these ninja carbs with emgo pods? I'm pretty sure its an air fuel ratio problem. I don't think so......Do you have your old carbs to try M.J's ?...Just in case they are to big & flooding till the revs are up. |
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Post by thewiz on Feb 12, 2017 0:30:15 GMT -6
I have the old carb but I had to drill out the left carb jet to get it to work but its only one size up. I'm going to slowly cover up the pods and see if performance returns
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Post by Blaine on Feb 12, 2017 6:34:58 GMT -6
I have the old carb but I had to drill out the left carb jet to get it to work but its only one size up. I'm going to slowly cover up the pods and see if performance returns If it does than you can cut more coils of the spring.  |
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Post by thewiz on Feb 19, 2017 0:45:40 GMT -6
ok i taped half the air filter off and cut 2 more coils off and it has improved quite a bit still not really any low end its choppy. i take it on a country road and full throttle pull. 1st choppy at first then great 2nd great 3rd horrible like it ran out of fuel. ok so i try again once the bike runs downhill in neutral for a minute, shift into 3rd and full throttle then 3rd is great and 4th slowly dies off. both pulls about 45 seconds until it dies off. oh and cruising at about 4k rpms is awful any cruse speed below 7k sucks its very choppy. i could probably figure this out with time but i dont want to buy any unnecessary parts so im grateful for the help.
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Post by Blaine on Feb 19, 2017 7:35:27 GMT -6
ok i taped half the air filter off and cut 2 more coils off and it has improved quite a bit still not really any low end its choppy. i take it on a country road and full throttle pull. 1st choppy at first then great 2nd great 3rd horrible like it ran out of fuel. ok so i try again once the bike runs downhill in neutral for a minute, shift into 3rd and full throttle then 3rd is great and 4th slowly dies off. both pulls about 45 seconds until it dies off. oh and cruising at about 4k rpms is awful any cruse speed below 7k sucks its very choppy. i could probably figure this out with time but i dont want to buy any unnecessary parts so im grateful for the help. Starting to sound like the floats are a little low....Running outta fuel. |
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Post by thewiz on Feb 19, 2017 18:31:53 GMT -6
I raised the floats, adjusted the springs, and removed tape off the pods. It runs better but it still feels like im out of fuel cruseing down the highway it really boggs down in 6th gear but if i shift down and go full throttle its all there pulling great but its just a cruseing speed i have problems with. Is this still a spring problem? Or a fuel problem?
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Post by Blaine on Feb 19, 2017 20:04:48 GMT -6
I raised the floats, adjusted the springs, and removed tape off the pods. It runs better but it still feels like im out of fuel cruseing down the highway it really boggs down in 6th gear but if i shift down and go full throttle its all there pulling great but its just a cruseing speed i have problems with. Is this still a spring problem? Or a fuel problem? I think fuel ......The spring is response & bogging usually. |
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Post by dave454 on Jun 26, 2017 1:38:58 GMT -6
Make sure to check any place that air can leak into the carbs. I did a valve job and tried three different ecms before I figured this one out. the crank case recirc valve - that round thing stuck on top of the engine with all the hoses- gets old and starts to leak air. It has a hose going to the right side carb and when it goes bad you loose vacuum in the carb and the right cylinder cant draw in enough fuel. Hence the dead cylinder. Get a rubber vacuum cap to put over the hose connection on the carb and let someone else save the planet.
The other thing to check is the idle adjustment screws. By now most people have drilled out the factory caps and removed the needle valves to clean them. If you haven't done that yet and your bike idles poorly that is the fix. The o rings on those needle valves may not seat properly and you will have another air leak. My bike wouldn't even start and when I sealed the needle valves it started right up. I used plumbers thread tape on the screw threads and it worked great. Dont use gasket sealer or any type of paste, it could get sucked up into the jet and clog it.
Now that I have the carbs sealed up my bike is scary fast. Anyone need a used ecm?
Correction, the round thing with the hoses is a suction valve that pushes fresh air into the exhaust stream to reduce emissions.
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