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11-12-2016, 06:16 PM,
#1
Smoking cylinder and loud knock, good job Phil...
Welp. I just got finished up re-jetting my 01 1100 custom, installing a new exhaust, checking the valve clearance and swapping out a throttle cable. I made no adjustment whatsoever to the valves. Got it all put back together and thought I'd start it up...right? Well, while it's trying to turn over, there is a loud knocking noise that wasn't there before, and it's having a really tough time starting Dodgy....hmm. It finally starts after a few tries with a super high idle, and then I see smoke coming from the front cylinder. What the heck!? Something is definitely wrong and I don't know what it is or what to try. Keep in mind I'm not super mechanically inclined, and I'm a newbie bike owner/rider. I'd love to be able to work on my bike myself, but I don't have any idea what I screwed up. Anyone care to take a stab at it?? Thanks in advance!
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11-12-2016, 07:26 PM,
#2
RE: Smoking cylinder and loud knock, good job Phil...
carbs not seated in the manifolds
2007 1100 custom,cobra longs and pods,doubled clutch spring.
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11-12-2016, 07:48 PM,
#3
RE: Smoking cylinder and loud knock, good job Phil...
Dang, seriously? That would be awesome. Not questioning, but how does that cause the knocking, difficulty starting, and smoke? Just to help me understand what I'm doing....Thanks a lot for the reply.
(11-12-2016, 07:26 PM)nick59 Wrote: carbs not seated in the manifolds
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11-12-2016, 08:19 PM,
#4
RE: Smoking cylinder and loud knock, good job Phil...
is it knocking when you try to start it? if the knock is when you try to start it could be the engine misfiring and causing kickback. could the smoke be from oil on the exhaust pipe from doing the valves?you need to go back over and check everything you did.
2007 1100 custom,cobra longs and pods,doubled clutch spring.
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11-12-2016, 09:55 PM,
#5
RE: Smoking cylinder and loud knock, good job Phil...
I think it's a knock...here's a link to the video from when I first tried to start it, take a look...https://youtu.be/qsuTOFlih9k

Yea that very well could be what the smoke is from. It freaked me out and I didn't want to make anything worse.
(11-12-2016, 08:19 PM)nick59 Wrote: is it knocking when you try to start it? if the knock is when you try to start it could be the engine misfiring and causing kickback. could the smoke be from oil on the exhaust pipe from doing the valves?you need to go back over and check everything you did.
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11-12-2016, 10:12 PM,
#6
RE: Smoking cylinder and loud knock, good job Phil...
sounds like kickback.. it will destroy the starter clutch. the bike has a oneway starter clutch when the engine tries to go in reverse it bangs against the dogs in the starter clutch when they wear out you have to replace. the starter clutch is about a $700.00 repair. i would'nt try to start it until you figure out whats wrong... i said the carbs could have come loose from the manifolds because thats what mine did after a carb removal and a piss poor reinstall.it sounded the same.
2007 1100 custom,cobra longs and pods,doubled clutch spring.
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11-12-2016, 10:28 PM,
#7
RE: Smoking cylinder and loud knock, good job Phil...
Ouch. Thanks for the info. I'll make sure the carbs are sitting properly and go from there I guess.
(11-12-2016, 10:12 PM)nick59 Wrote: sounds like kickback.. it will destroy the starter clutch. the bike has a oneway starter clutch when the engine tries to go in reverse it bangs against the dogs in the starter clutch when they wear out you have to replace. the starter clutch is about a $700.00 repair. i would'nt try to start it until you figure out whats wrong... i said the carbs could have come loose from the manifolds because thats what mine did after a carb removal and a piss poor reinstall.it sounded the same.
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11-12-2016, 10:40 PM,
#8
RE: Smoking cylinder and loud knock, good job Phil...
https://sites.google.com/site/vstar1100k...tuning/tps you could of bumped the tps setting.it's mounted on the side of the carb. it can advance the timing to far and cause kickback.you need a ohm meter.
2007 1100 custom,cobra longs and pods,doubled clutch spring.
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11-12-2016, 11:24 PM,
#9
RE: Smoking cylinder and loud knock, good job Phil...
From what I understand...if I check/adjust the tps before adjusting the idle speed to where it should be, I won't be doing any good, but if I start it up to adjust the idle before correcting the tps setting I could cause serious damage. Do you know off of the top of your head which way you need to turn the idle adjustment screw to decrease it? Maybe I can just get it close enough to work with?
(11-12-2016, 10:40 PM)nick59 Wrote: https://sites.google.com/site/vstar1100k...tuning/tps you could of bumped the tps setting.it's mounted on the side of the carb. it can advance the timing to far and cause kickback.you need a ohm meter.
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11-12-2016, 11:37 PM,
#10
RE: Smoking cylinder and loud knock, good job Phil...
turning to the right increases the idle.. if while trying to adjust the tps and its a little out try turning up the idle screw a little. if the tps is what is causing the problem then its probably way off. so in the ballpark is good.
2007 1100 custom,cobra longs and pods,doubled clutch spring.
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11-12-2016, 11:51 PM,
#11
RE: Smoking cylinder and loud knock, good job Phil...
Makes sense. Thanks for all your help. Hopefully I'll be able to get into that tomorrow.
(11-12-2016, 11:37 PM)nick59 Wrote: turning to the right increases the idle.. if while trying to adjust the tps and its a little out try turning up the idle screw a little. if the tps is what is causing the problem then its probably way off. so in the ballpark is good.
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11-13-2016, 12:05 PM,
#12
RE: Smoking cylinder and loud knock, good job Phil...
Checked resistance on the TPS. Resistance between blue and black - 5.1kohm (within standard), but resistance between yellow and black was .929kohms. I adjusted the sensor to put it within standard, but it maxed out at .91kohms...
(11-12-2016, 10:40 PM)nick59 Wrote: https://sites.google.com/site/vstar1100k...tuning/tps you could of bumped the tps setting.it's mounted on the side of the carb. it can advance the timing to far and cause kickback.you need a ohm meter.
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11-13-2016, 12:47 PM, (This post was last modified: 11-13-2016, 01:04 PM by nick59.)
#13
RE: Smoking cylinder and loud knock, good job Phil...
(11-13-2016, 12:05 PM)pwork703 Wrote: Checked resistance on the TPS. Resistance between blue and black - 5.1kohm (within standard), but resistance between yellow and black was .929kohms. I adjusted the sensor to put it within standard, but it maxed out at .91kohms...
(11-12-2016, 10:40 PM)nick59 Wrote: https://sites.google.com/site/vstar1100k...tuning/tps you could of bumped the tps setting.it's mounted on the side of the carb. it can advance the timing to far and cause kickback.you need a ohm meter.
mine was high too.i raised the idle screw a little and it brought it down closer but it never came into range.

maybe your only firing on one cylinder, check your plugs.
2007 1100 custom,cobra longs and pods,doubled clutch spring.
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11-14-2016, 05:32 PM,
#14
RE: Smoking cylinder and loud knock, good job Phil...
(11-13-2016, 12:47 PM)nick59 Wrote: Finally had a second to take them out. I don't have much experience reading plugs, but looks like the bike has been running rich. Hard to say what it will do now though because I just installed a new full exhaust and re-jetted. The front plug is dirty all the way up the threads, while the rear plug is dirty about 1/2 way up the threads. Not sure exactly what that's telling me or what to be looking for to show if only one cylinder has been firing...Here's a link to pics of the plugs. https://drive.google.com/drive/folders/0...sp=sharing
(11-13-2016, 12:05 PM)pwork703 Wrote: Checked resistance on the TPS. Resistance between blue and black - 5.1kohm (within standard), but resistance between yellow and black was .929kohms. I adjusted the sensor to put it within standard, but it maxed out at .91kohms...
(11-12-2016, 10:40 PM)nick59 Wrote: https://sites.google.com/site/vstar1100k...tuning/tps you could of bumped the tps setting.it's mounted on the side of the carb. it can advance the timing to far and cause kickback.you need a ohm meter.
mine was high too.i raised the idle screw a little and it brought it down closer but it never came into range.

maybe your only firing on one cylinder, check your plugs.
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11-14-2016, 06:36 PM,
#15
RE: Smoking cylinder and loud knock, good job Phil...
the front one is black and the rear is almost as black.the rear cylinder runs hotter so maybe thats why the difference.your carbs are jetted wrong. its so carboned up maybe thats why it wont run.in the wkb under the tuning section there is a chart what will tell you how it shoulsd be jetted for your setup. your setup would be do you have stock intake and exhaust.your jets are stamped so find out what numbers they are. and what the pilot mixture screws are set at.jets are main and pilot. and the needle could be shimmed.
2007 1100 custom,cobra longs and pods,doubled clutch spring.
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