need help! cant figure out ignition issue

my 82 xj1100 is really testing me. i have a cylinder that once warmed up gives me a ta ta ta ta ta ta ta and power loss. i hear it from both engine and exhaust note. it was suggested that it was a coil going bad so i replaced it with a ebay coil and same prob no change. seafoamed the carbs and new gas. if i shut the engine off for 1o seconds and restart i have full power and no ta ta ta ta ta for a bit. new plugs and im at the end of my rope.

 

after restart the issue will usually return within a minute.

 

possibly TCI or pickup breakdown as things get hot. Can you give us more details of any sort? Don't get frustrated yet.......weve only just begun. (Hey, I think there's a song in there somewhere)

Dave F

 

You have to perform some maintenance, trouble-shooting and diagnostics.

Check for Compression
Adjust Valves if Compression shows there's no serious problems.

SeaFoam isn't going to Clean the Carbs.
To accomplish a thorough Carb Cleaning; the Carbs will need to be removed, disassembled and individually cleaned.

After the Carbs are done you get to Clean Wiring Harness connections.
Replace the Fuse Panel.
Then, check the Ignition-related parts against specs.

You need to do everything you haven't done or don't have a Work Order for having been done within the last 5000 miles.

 

yup, what he said.

dave f

 

well ill do a compression test tomorrow and see what the results are. unfortunitly this bike has fallen apart since purchase so im thinking since i have bad gears anyway just time to yank the thing out replace gears, replace all gaskets do a valve job and go from there

 

It would be cheaper to locate a good-running engine and swap it for the one you got.

$250.00 is a great price for a runner.
Your stuff for what's missing.

http://washingtondc.craigslist.org/doc/ ... 68091.html

 

How many miles on your 1100's engine currently? Since your problem reliably crops up at the same time interval after starting it's related to what's changing. Notably the temperature, pressure etc. You might discover the issue if you go step by step and eliminate what it isn't, then what remains is the problem.

Don't give up just yet. Your only at the end of the rope when despair is all that remains. If it's running at all there is still hope, but if your mileage is really high Rick's idea would make sense to restore your ride. Then you could part out what's good from your old plant.

 

well it has 40k on it which doesnt sound high mileage to me but who knows. i already have a spare gear set and shift forks purchased off ebay. i dont see very many xj motors for sale and from what i understand if i bought a xs motor like the link you posted wouldnt i have to change many internals to make it a xj with yics

 

I thought the ad engine was a XJ.

I looked-up another Engine claiming to be a low-mileage XJ11 Plant and that was a XS Motor, too.

I have a 900 Engine to sell that might suffice ... with some mounting fabrications.

This place has XJ & XS 11 Plants.
A bit pricey.

http://www.drumhillcycle.com/Engines/fu ... /3,3897075

http://www.drumhillcycle.com/Engines/fu ... /3,3339380

http://storage1.colony1.net/2195/Produc ... %20107.jpg

 

is tearing these things apart that bad? ive done car engines and rebuilt a car transmission a few years back with a buddy. i dont want this bike to be a money pit and wouldnt mind learning a few things. any info on doing a rebuild would be appreciated

 

those listings say xj but if you look on the side none of them have the yics logo. yics i dont think came out till 82 so these will be hard to find.

 

Check out the XS11 Site for the gear fix. Meanwhile let's figure out what's going on here. Please report your compression numbers.

MN

 

well i bought a harbor freight comp tester..all cylinders are 95-100 psi. oil in the cylinder didnt change much. not sure what to think. first all the cylinders are close so thats good but since its a harbor freight comp tester im thinking the results are low partially due to the tester. it is running more crappy than ever. at this point not sure if i should tear her apart or just part it out . this bike has only been a nightmare

 

I think you need to check and adjust the valve clearances and re-test.

Compression of 95~100psi is LOW; and the fact that oil in the cylinders didn't help points to the valves.

Tight valves will cause low compression numbers (and your original symptoms.)