Question about Yamaha XS 400 L Maxim Motorcycles

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Need to change timing chain on a '84 XS400, and would like a schematic of the engine,and valve clearance specs. At the same time, the thought is that I should be able to loosen off chain tensioner, and wind new chain through without disturbing anything. Also reed to know where the alignment marks are...Thanx

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Http://www.cmsnl.com/yamaha-xs400k-maxim-1983_model8929/partslist/A-10.html

Link has all the schematics for all sections, links to specifications as well...good luck and Cheers!

Posted on Sep 04, 2010

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Sounds like valve clearances are not correct.

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1981 Yamaha xs400 timing specs


Hi, Kbrushett for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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http://mybikemanuals.com/yamaha/yamaha-xs-owners-manuals

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2006 pontiac vibe getting close to 100K and feel the need to change the timing chain. Someone advised that is this breaks it destroys the whole engine Trying to divert trouble later.


It is personal taste. Some places recommend that timing CHAINS be replaced every 90K-100K, but others drive until there is some change in their engine performance that would indicate the timing chain and then change it. Since you have the timing chain and not the timing belt it is up to you.

Generally, I will replace timing chains IF I have to pull my engine out of the car for any reason, but won't change it at set intervals.

Jul 07, 2011 | 2006 Pontiac Vibe

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We removed the cam and did not pay attention to timing marks. the engine was rotated without cam in it. How do we set the timing?


Take the cam out and put the piston at TDC
Look at the cam with the cam gear facing you.
Turn the cam until both lobes are down(on the bottom of the cam)
Look at the cam gear, there should be 2 marks across from each other at 3 o'clock and 9 o'clock
Those marks need to be parellel to the head when you set the cam in the head, carefully place the timing chain around the cam gear, trying not to move the cam.
Once you have the chain on, push the cam down in its slots in the head and look ate the timing marks on the cam gear.
They should be parellel with the head, and straight across from each other.
Recheck that the piston hasn't moved and your still on TDC.
If all is good put the rockers/valve cover on and timing chain tensioner in. Tighten the cover to specs then adjust your valve clearances to specs and your done with the timing.

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I own a 2004 BMW R1200CL. Almost every time I crank the engine I can hear the valves rattle. I have checked and adjusted the valve clearances to spec. The rattle goes away after the engine starts, but...


Yep, most of these bikes do rattle on startup. The noise is from cam chain slack. A hydraulic tensioner is used in the engine on each side as there are two cam chains. The tensioner leaks down after the engine sits for a while and the chain rattles for a few seconds till the tensioner gets pumped back full of oil again. Once the chain is tight again, then no noise.

BMW came out with an improved tensioner (doesn't leak down as quickly) that you can install on your engine to fix the rattle. Note that it is much easier to change the RHS tensioner than the LHS one.

Good Luck!

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My TVS fiero f2 motor cycle is having heavy tapplet sound,as i approached a mechanic he told me to change camshaft, is it necessary?As is it is so expensive.My bike gives mileage of 40 kmpl.plz suggest me...


Have you first tried to adjust the valve clearance? It could be just the valve clearance are out of specs ...(lose) and thus the noise.
Check the valve clearance first.
Hope this helps!

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Noisy startup when cold, sounds like valve


Hello onarock844...The Hyundai 2.4 litre and the 3.3 litre are known to have valve train noise. Some sooner than others.
The timing chain tensioners on the 06 and 07 Sonata 3.3 engines built before August 4, 2006 are well known for developing wear that allows them to make a tapping or rattling noise for a short time after a cold start. This noise can be mistaken for a lifter noise, although the actual source is in the front cover area of the engine. Hyundai has released a technical service bulletin on this problem, which describes installation of an updated design timing chain tensioner (part #24410-3C300) to correct this noise issue.
Ask your dealer to refer to Hyundai service bulletin #06-20-002 for information...If this has already been corrected,,,and the noise is coming from the upper engine area and not from the timing chain area, then the valve clearance will need to be adjusted. This is done by disassembling the valve train and installing slightly different size tappets to change clearance.
This is a fairly labor intensive process, so if you are still under factory warranty then you will want to go over the dealer's head and get the Hyundai zone rep involved to get it covered before your warranty coverage expires...
I recommend useing a full synthetic engine oil, i know in a few cases where the noise has stopped when the oil was changed over to synthenic, also a high quality filter is important, such as a purolator.
Good luck...i hope this helps...please rate me a fixya.

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1 Answer

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Chain drive. Unless the engine's been apart, why would the cam/valve timing change?
Valve clearances are another matter, and unless you want to remove the camshafts, get a mechanic who has the proper Suzuki tool to do them for you. You can measure the clearances, but the shims are between the cam lobe and the valve bucket, and the special tool holds the bucket down whilst changing to a thicker or thinner shim.

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what an *******. If I had a manual or my library had one I wouldnt be asking the question. If I need help fixing something dont tell me to go jump in a lake just dont answer

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