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Post by lisburnman on Sept 30, 2014 13:48:26 GMT
Hi allNow if put a couple of hundred miles on the 250 which sat for a long time I'm noticing a good knocking rattling at low revs , quietening down over 3000 revs I'm hoping its can or balance chain related .
I am planing on poping off rocker for a manual adjustment of cam chain and shall check valve clearance. Can anyone describe balance chain noise, the adjuster is fully round in the slot so a bit of a guide to turning it on the splines would help. Can clutch casing be removed with brake pedal and exhaust still in place 
I'm praying its not big end or crank knocking but I'd a thought revs would bring out more noise, any help or ideas appreciated mike..:-\
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Post by lisburnman on Nov 4, 2014 17:49:47 GMT
Well im replying to my own post as none of the 100plus views have done so.
Good news balance chain easy adjustment quadrant off move on splines retension bobs yr uncle. Checked punch mark on splined shaft sitting at11oclock so all good.
Did tappets and cam chain adjustment again and discovered the generator fly wheel was loose. Cleaned and tightened and engine now quiet as a cb250n superdream gets. A nice whurrr and a tiny tick tick half a thou out on tappets do well for now.
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Post by Harold on Nov 4, 2014 18:23:58 GMT
Glad you got it sorted Mike I've only just saw your post but would have been no use to you anyway as you know more than I do.  |
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Post by lisburnman on Nov 4, 2014 20:42:37 GMT
Glad you got it sorted Mike I've only just saw your post but would have been no use to you anyway as you know more than I do. like to be able to dismantle and rebuild 4 stroke engine wish there was a wee night class taught that stuff Um im searching for a two stroke twin cheap ... keep that quiet.... You dont know of any |
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Post by revver on Nov 4, 2014 21:01:47 GMT
i have just seen your post too, glad its sorted now, i was going to say that if the big end is starting to go you will hear it more when under load, but no need now lol. |
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Post by scania on Nov 4, 2014 21:54:50 GMT
Glad you got it sorted, whats is the purpose of the balance chain? I thought counter balancers were always fitted direct on the crank shaft, so why the chain? |
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Post by Harold on Nov 4, 2014 23:04:59 GMT
Glad you got it sorted Mike I've only just saw your post but would have been no use to you anyway as you know more than I do. like to be able to dismantle and rebuild 4 stroke engine wish there was a wee night class taught that stuff Um im searching for a two stroke twin cheap ... keep that quiet.... You dont know of any Don't know of any at the minute Mike what about Gumtree there's a couple of SS 50s on there. |
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Post by giannis on Jan 5, 2022 17:53:19 GMT
Happy New Year everybody! I need to change the counter balance chain on my CB400n. Any ideas about where to find it in UK or EU?
Thanks!
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ian
Member Of The Year 2019 
Isle of Man
Posts: 5,259 
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Post by ian on Jan 5, 2022 21:39:55 GMT
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