Engine Noises pre valve adjust

1996 Suzuki DR350SE - Pre valve adjustment idle noise at 1500 RPM after bike has been warmed up well (90° day, 15 miles at 60 mph)

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• engine
• noise
• DR350

[entoptics]

2.5 years and 4K miles after valve adjust, pretty much sounds and works the same. Recently mileage is sub par (40 mpg), fussy starting, and boggy stop to gos.

Regardless for the money to miles (smiles) ratio, I still can't imagine a more bombproof bike.

Thanks for the recent comments. Its reminded me to replace cam chain and tensioner. It was checked ~2K miles and a year after this vid and seemed good with plenty of adjustment left. With a year/2K miles more, I'm sure it needs replacing.

[klozedbeataofficial]

Cam Chain, 100%. Its not properly tensioned, AKA, the chain is loose. With the speed at which it revolves, its basically slapping all over the place. Thats what makes the sound. Check your workshop manual on how to adjust it.

[1100HondaCB]

below 40 mpg is crap! I would expect at least 50 mpg everytime.

[Patmclean232]

Yeah get that checked out... I had an 84 xr350 that the Cam chain was stretched and the bottom cam gear was no good. It jumped time while it was running and burried the pistons in the intake valves and made one hell of a mess... Check your cam chain guides if they are chewed up that's an indication the chain is slapping around. But I damaged the head,the valve seat,valve guide,bent one valve and busted the other valve in half. So trust me get in there and see what's going on!

[Tsnafu]

Sounds like a bad camchain to me. Luckily the SP/GN/DR engines (they are all the same) are really easy to change a camchain and tensioner on. Get it to TDC on compression (both valves shut and piston at top) take the rocker and side cover off, unbolt the cam sprocket and lower the chain to get it off the bottom sprocket. Don't move the cam and it will all go back on easy as pie afer you have replaced the tensioner blade.

[ollecarlsson]

@k4rma2burn had a bent valve, then the clearance later made a huge difference to the performance; watch?v=mzMXrLkRNQU

[k4rma2burn]

@ollecarlsson

Try and find a workplace manual!! Or buy one! This will help you ALOT! :)

[k4rma2burn]

@ollecarlsson

Inte bra det :/ I heard that Honda's have this cable from the kickstarter to the valves. If you lost all compression it could be that this cable is opening the decompression valve. The kickstarter should automatically pull this cable every now and then at the right moment. Honda XL 500's have these cables.

Let me know when your video is on!

[ollecarlsson]

@k4rma2burn will tear down the top and upload video of it here, I have NO IDEA what to look for in a 4-stroker, the valve thing, djeeees boring start of this bike!!

[ollecarlsson]

@k4rma2burn .....the valves were tapping a tiny bit when I got it, seller mentioned it too, approx 2 hours later the bike just cut out suddenly, instantly, no compression and wont start of course, something broke down on me? Seller sounded trustful afterwards that it cant be anything serious, more like the handle that turns off/decompress the engine is doing something. When I tried "bump start" and engines spinning a little, the valve tapping sounded stronger! Thx for help!!!

[k4rma2burn]

@ollecarlsson

could also be the camchain that needs adjustment, så ingen fara