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Post by rusty on Jun 6, 2015 18:03:45 GMT
Started my bike up today for the first time in a couple of weeks and got it up to temperature and I thought all was ok (apart from needing to balance the carbs again) but noticed that number 4 exhaust header was a lot cooler than the rest...I know it runs fine although I need to up the main jets but otherwise fine and it starts on the button fine so.....
any ideas???
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Post by kokolis on Jun 6, 2015 18:28:05 GMT
Carbs, valve clearance, spark plugs, air filter.
All above have to be in a good nick for a similar reading among cylinders.
A temperature gauge is a nice toy.
Oil consuption will also affect a reading
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Post by rusty on Jun 6, 2015 20:07:30 GMT
Carbs, valve clearance, spark plugs, air filter. All above have to be in a good nick for a similar reading among cylinders. A temperature gauge is a nice toy. Oil consuption will also affect a reading carbs have been ultrasonically cleaned twice, new spark plugs...runs k&n pod filters with 2.5 turns of mixture screws...maybe they could do with a clean...valve clearance is what I'm hoping its not as it was running fine before:-/ |
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Post by kokolis on Jun 6, 2015 21:01:14 GMT
A same amount of mixture through all cylinders + a good burn equals a same temperature through the headers.
Carbon built or a valve that leaks will give you a lower reading, as a rich mixture will also do.
A lean mixture has a higher reading.
A difference of +_ 10 degrees C, wouldnt be a problem, more it will.
Ofcourse spitting on the headers or feel them how warm with a hand are will only be noticeable by a significant difference
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Post by kokolis on Jun 6, 2015 21:09:00 GMT
Also a compresion leak will give you a lower reading
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Post by rusty on Jun 6, 2015 22:14:06 GMT
Also a compresion leak will give you a lower reading its a noticeable difference, put it this way...I can put my hand on number four header and hold it there for a few seconds but the rest I cannot touch at all:-/ |
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Post by zooma on Jun 6, 2015 23:33:18 GMT
Also a compresion leak will give you a lower reading its a noticeable difference, put it this way...I can put my hand on number four header and hold it there for a few seconds but the rest I cannot touch at all:-/ Are yer HT leads alright Rusty? |
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Post by rusty on Jun 7, 2015 6:45:19 GMT
its a noticeable difference, put it this way...I can put my hand on number four header and hold it there for a few seconds but the rest I cannot touch at all:-/ Are yer HT leads alright Rusty? as far as I know, yes but will check they are all connected right etc today |
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Post by rusty on Jun 13, 2015 18:09:47 GMT
 Managed to get the valve cover off today by lowering the engine slightly...checked the valve clearances and all were fine but no4 exhaust valves were a little tight so adjusted them...fingers crossed that will help...will get the carbs balanced soon then hopefully that will be it:-) |
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Post by zooma on Jun 13, 2015 18:20:06 GMT
Good news mate, glad ya didn't have to drop it out after all. Sounds like the clearances on these oil cooled motors don't take too kindly to being either side of perfect?
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Post by kokolis on Jun 13, 2015 22:02:40 GMT
I set them always in the middle.
Also when between spec, once a year, so I know that its cleared
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Post by zooma on Jun 13, 2015 22:20:55 GMT
I set them always in the middle. Also when between spec, once a year, so I know that its cleared Cheers fella, got very little experience with these Suzuki oil boilers so all info... is good info! |
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Post by rusty on Jun 14, 2015 6:18:49 GMT
I set them always in the middle. Also when between spec, once a year, so I know that its cleared They are all set so that a .15 feeler gauge has a nice even drag... |
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