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My bastard bandit...

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TheBikerStig
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PostPosted: 18:28 - 26 Aug 2013    Post subject: My bastard bandit... Reply with quote
The engine on my 1250 bandit makes a rattle sound when accelerating from low revs. Although the rattle goes away pretty quickly it still pisses me off. Its recently had a major service including a valve clearance job. Apart from this rattle the engine seems otherwise fine. Is this a sign the engines close to fucked?
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Clutchy
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PostPosted: 20:05 - 26 Aug 2013    Post subject: Re: My bastard bandit... Reply with quote
TheBikerStig wrote:
The engine on my 1250 bandit makes a rattle sound when accelerating from low revs. Although the rattle goes away pretty quickly it still pisses me off. Its recently had a major service including a valve clearance job. Apart from this rattle the engine seems otherwise fine. Is this a sign the engines close to fucked?



I asked a similar question, thought it was cam chain rattle judging by other threads but I'd read.

However my main idea was where I had cleaned the chain it was slapping against the swing arm, possibly your chain is loose?
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clancy
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PostPosted: 22:20 - 26 Aug 2013    Post subject: Reply with quote
I'd of said obvious culprits are valves (but you said that's recently been checked so can rule that out)

Second obvious option would be the chain as above, check its not a touch too slack ? Could explain why it's only at Low revs, faster it revs the chain will be pulled more taught

Does it do it stationary on tick over ?
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Pete.
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PostPosted: 22:29 - 26 Aug 2013    Post subject: Re: My bastard bandit... Reply with quote
TheBikerStig wrote:
The engine on my 1250 bandit makes a rattle sound when accelerating from low revs. Although the rattle goes away pretty quickly it still pisses me off. Its recently had a major service including a valve clearance job. Apart from this rattle the engine seems otherwise fine. Is this a sign the engines close to fucked?


My 600 does it too, sounds like pinking when coming off low rpm with load. I ignore it, it's been doing it for thousands of miles and has got no worse.
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Im-a-Ridah
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PostPosted: 07:26 - 27 Aug 2013    Post subject: Reply with quote
Some say he can check his valve clearances without taking the valve cover off....

all we know is, they call him the Stig Biker.
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garth
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PostPosted: 08:41 - 27 Aug 2013    Post subject: Reply with quote
How low revs - not piston slap is it? My old mans old one (albeit high mileage) had a touch of piston slap if you were too gentle with the throttle on take off.
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sickpup
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Joined: 21 Apr 2004
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PostPosted: 09:06 - 27 Aug 2013    Post subject: Reply with quote
garth wrote:
How low revs - not piston slap is it? My old mans old one (albeit high mileage) had a touch of piston slap if you were too gentle with the throttle on take off.


So what it needed a rebore?
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garth
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PostPosted: 09:13 - 27 Aug 2013    Post subject: Reply with quote
sickpup wrote:
garth wrote:
How low revs - not piston slap is it? My old mans old one (albeit high mileage) had a touch of piston slap if you were too gentle with the throttle on take off.


So what it needed a rebore?


It probably did, it's since departed.
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TheBikerStig
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PostPosted: 16:52 - 27 Aug 2013    Post subject: Reply with quote
clancy wrote:
I'd of said obvious culprits are valves (but you said that's recently been checked so can rule that out)

Second obvious option would be the chain as above, check its not a touch too slack ? Could explain why it's only at Low revs, faster it revs the chain will be pulled more taught

Does it do it stationary on tick over ?


Only does it when moving. Its loudest when driving in a gear that is too high.
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SQL
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PostPosted: 17:56 - 27 Aug 2013    Post subject: Reply with quote
TheBikerStig wrote:
clancy wrote:
I'd of said obvious culprits are valves (but you said that's recently been checked so can rule that out)

Second obvious option would be the chain as above, check its not a touch too slack ? Could explain why it's only at Low revs, faster it revs the chain will be pulled more taught

Does it do it stationary on tick over ?


Only does it when moving. Its loudest when driving in a gear that is too high.


drive chain is loose?
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TheBikerStig
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PostPosted: 19:14 - 19 Sep 2013    Post subject: Reply with quote
Drive chain is fine, that tends to make more of a knocking noise when its loose ime. Anyway how safe do you think it is to ride another 6000 or so miles (until I get it serviced next) assuming it is either piston slap or a loose cam chain?

Edit: Searched for piston slap and what it sounds like. Does sound kind of like this at 30 secs in:
https://www.youtube.com/watch?v=PW1vk7jROik
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Old Thread Alert!

The last post was made 12 years, 103 days ago. Instead of replying here, would creating a new thread be more useful?
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