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Author Topic: My DRZ has started to rattle  (Read 526 times)

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Offline Grumpleton

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My DRZ has started to rattle
« on: July 04, 2014, 05:19:47 pm »
Hers one for the DRZ engine specialists  :thumleft:
My Drz has developed a bit of a rattle on low revs and on the rev run off,   :-[ When we rebuilt the gearbox we replaced all the bearings and cam chain, but did not touch the piston, we merely disconnected it from the conrod whilst it was still in the bore,
The bike is running fine and has its normal amount of power   :ricky:  but it has this annoying rattle (sound like a washer rattling on a bolt,) coming from the motor and it can be heard much louder coming from the air box, so what do you think it may be, do I need to strip it again and do the rings and piston or just leave it and hope it goes away.  ???
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Offline Kenzogs

Re: My DRZ has started to rattle
« Reply #1 on: July 04, 2014, 09:42:35 pm »
Grumbles. Besides what we discussed about timing chain tension and rings I recall a thread a while back about similar symptoms being caused by the countershaft gear nut being loose.
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Offline Mello

Re: My DRZ has started to rattle
« Reply #2 on: July 05, 2014, 04:48:58 am »
Not possibly the cam chain tensioner?  It is a weak point on these bikes.  I've replaced mine before due to a rattley engine.


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Offline Grumpleton

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Re: My DRZ has started to rattle
« Reply #3 on: July 05, 2014, 09:22:41 am »
Grumbles. Besides what we discussed about timing chain tension and rings I recall a thread a while back about similar symptoms being caused by the countershaft gear nut being loose.

mmm the plot thickens, def coming from the top of the motor did the screw driver to the ear test , I like your idea about the cam tensioner, the bike is not using oil and is not smoking, will test the tensioner today and see what happens , if not we will start to strip and look further  :thumleft:
« Last Edit: July 05, 2014, 09:24:01 am by Grumpleton »
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Offline lecap

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Re: My DRZ has started to rattle
« Reply #4 on: July 06, 2014, 12:42:07 pm »
Only the earlier cam chain tensioners did fail. The later models were fine and last forever. Don't replace the tensioner with the pathetic manual adjustment junk you can find on ebay, rather just get the later one (I think it's 2005ff).
Easy to tell the difference between the two tensioners, spring loaded screw (old) vs. spring loaded ratchet (new).
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Offline Grumpleton

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Re: My DRZ has started to rattle
« Reply #5 on: July 08, 2014, 07:00:37 am »
Only the earlier cam chain tensioners did fail. The later models were fine and last forever. Don't replace the tensioner with the pathetic manual adjustment junk you can find on ebay, rather just get the later one (I think it's 2005ff).
Easy to tell the difference between the two tensioners, spring loaded screw (old) vs. spring loaded ratchet (new).

Thanks for the info, the bike is a 2005 with a ratchet tensioner

the rattle was coming from the carb, cycled it a few times and the rattle went away, go figger , will ride next week end if the weather plays with and test , will let you know,
Bikes : 2003 KTM 950 adventure S, 2018 KTM 690 Enduro R , BigBoy Revival 150 for the dorp.

Sun, Wind and Sail and for those colder days, My Bike.
Live for today, because yesterday has gone and tomorrow may never come.