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Offline Evilkinevil

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Drz shim size
« on: January 05, 2018, 08:04:43 am »
Hi
I bought a drz400 sm converted to a s a few months ago. The one who was build for amageza. Only did one funduro with it.
Next time i rode it i ran out of petrol on n1. Then struggled to start after filled with petrol. And could barely start at end of the day.
Thought carb jet was clogged so cleaned carb but now doesnt want to start at all. Checked valve clearance and found no clearance on intake side and 0.28 on exhast side. Removed shim on intake side and measured to be 2.1mm.

Previous owner checked valves before i bought bike and replaced oil with 20w60 shell for high milage diesel engine.
Could the oil cause valves to wear so quickly.
Could the running out of fuel cause the valve wear.
Do i need to replace the valves or do one get smaller shims and would it be advisable to fit smaller shims.
Bike has athena head but says tbr on side. With hotcams fitted.
A friend is helping me with bike as ive never done something like is before.
Any help would be appreciated.
Kind regards
Dewald
 

Offline madmax

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Re: Drz shim size
« Reply #1 on: January 05, 2018, 09:35:34 am »
just subscribing as interested (due to my drz) ... I would think the oil may have been a factor but I truly just talking out loud and u know empty vessels make the most noise
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Offline Evilkinevil

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Re: Drz shim size
« Reply #2 on: January 05, 2018, 09:55:20 am »
Also asking because someone told me there would be little lubrication to the head due to high viscosity. Wanted to warm up engine to change the oil but wouldnt start. So checked valves. Found no clearance on intake side. Also 2.1mm shim fitted have nothing writen on it aswell as chart only goes to 2.3mm.
Bike has stage 2 hotcams and head written tbr on side.
So i dont know if i can put smaller shim in because head might be different than std. Or can put smaller shim in because of the hotcams. Or should i remove head and fit new valves. And if i do fit valves should i fit all new from suzuki or what would be best.
Last thing i want is to mess up engine. Barely used it since i bought it.
 

Offline sidetrack

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Re: Drz shim size
« Reply #3 on: January 05, 2018, 10:04:38 am »
I'm a bit confused but you can certainly fit different shim thickness that is how you adjust valve clearance on the bike after all. If the oil could have caused the valve clearance to drop well I'm not sure but I wont put diesel oil in a DRZ, it might be ok for an older spec engine like a DR or KLR. Did you inspect the air filter to see if no dust is getting into the motor ? I would get the valves up to spec with new shims then put some decent oil in there, at the very least something like Castrol Actevo which I used for ages on my DRZ with zero issues. If the valves tighten up again (it always the intakes especially the right side one) then you may need to have the head redone as the seats might be toast.
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Ride reports :
http://www.wilddog.za.net/forum/index.php?topic=134175.0 Penge's pass and the Old Forest http://www.wilddog.za.net/forum/index.php?topic=9421.0 - Orange Atlantic adventure http://www.wilddog.za.net/forum/index.php?topic=7514.0 - 805 km day trip http://www.wilddog.za.net/forum/index.php?topic=20260.0 - East Cape Bash http://www.wilddog.za.net/forum/index.php?topic=70199.0 - Two KTM thumpers head north
 

Offline Evilkinevil

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Re: Drz shim size
« Reply #4 on: January 05, 2018, 10:16:41 am »
I will try buy smaller shims today. Just though not a good idea to go lower than 2.1mm shim. Since service manual chart stops at 2.3mm
Will definitely replace the oil once i get it started. Ive only done 1 funduro with the bike and didnt check before the race. But have fitted and lubed a new filter now.
They said in the add that bike was barely used for past 2 years since the rebuild. If they started with new shims and 2.1mn shims is fitted now then i think bike was used extensively and i probably need to replace the valves instead. This is just a guess since i know very little about bikes. Thats why im asking for advice.
 

Offline sidetrack

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Re: Drz shim size
« Reply #5 on: January 05, 2018, 10:29:24 am »
I will try buy smaller shims today. Just though not a good idea to go lower than 2.1mm shim. Since service manual chart stops at 2.3mm
Will definitely replace the oil once i get it started. Ive only done 1 funduro with the bike and didnt check before the race. But have fitted and lubed a new filter now.
They said in the add that bike was barely used for past 2 years since the rebuild. If they started with new shims and 2.1mn shims is fitted now then i think bike was used extensively and i probably need to replace the valves instead. This is just a guess since i know very little about bikes. Thats why im asking for advice.
If the manual says 2.3 max then yes you may be looking at getting the head done. The big bore and hotcams are nice but also means someone has worked on the motor before.
Little by little, one travels far

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Ride reports :
http://www.wilddog.za.net/forum/index.php?topic=134175.0 Penge's pass and the Old Forest http://www.wilddog.za.net/forum/index.php?topic=9421.0 - Orange Atlantic adventure http://www.wilddog.za.net/forum/index.php?topic=7514.0 - 805 km day trip http://www.wilddog.za.net/forum/index.php?topic=20260.0 - East Cape Bash http://www.wilddog.za.net/forum/index.php?topic=70199.0 - Two KTM thumpers head north
 

Offline Evilkinevil

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Re: Drz shim size
« Reply #6 on: January 06, 2018, 11:26:38 pm »
Shim on intake side was 2.1mm with no clearance  Fitted a 1.85mm shim and clearance is 0.2 now. Started bike and runs perfectly.
Read on internet its not recomended to go below 2mm shim. Can damage cup that goes over shim. And big possibility valve can come loose.
Think would be best to replace the valves.
Which valves would be best to fit. Standard suzuki or kibblewhite. Suzuki one is apparently a 2 piece valve.
Some say kibblewhite doesnt work well on drzs.
Also looks like valves shouldnt be lapped in. Destroy some coating on valve.
Is this correct.
Thanks for help thus far.
 

Offline Dux

Re: Drz shim size
« Reply #7 on: January 07, 2018, 07:57:32 pm »
Kibblewhite valves are good on the DRZ , I have done a few already .
You will need to cut the valve seats to the new valves or have very rapid valve wear on the new valved .
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Offline JustBendIt

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Re: Drz shim size
« Reply #8 on: January 07, 2018, 08:14:44 pm »
The bike you bought has had its neck wringed long and hard ... the previous owner only knew one speed ... full speed

TBR engraved on the side of the head is TIM BOSSON RACING ... Tim is an absolute wizard with motorcycle cylinder heads ... give him a call on 021 553 3228 and ask him all the questions you have asked here if you want the right answers
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Offline sidetrack

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Re: Drz shim size
« Reply #9 on: January 08, 2018, 08:08:18 am »
Nova's old DRZ ?
Little by little, one travels far

J.R.R Tolkien
Ride reports :
http://www.wilddog.za.net/forum/index.php?topic=134175.0 Penge's pass and the Old Forest http://www.wilddog.za.net/forum/index.php?topic=9421.0 - Orange Atlantic adventure http://www.wilddog.za.net/forum/index.php?topic=7514.0 - 805 km day trip http://www.wilddog.za.net/forum/index.php?topic=20260.0 - East Cape Bash http://www.wilddog.za.net/forum/index.php?topic=70199.0 - Two KTM thumpers head north
 

Offline JustBendIt

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Re: Drz shim size
« Reply #10 on: January 08, 2018, 08:14:33 am »
The older I get the faster I was
 

Offline Evilkinevil

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Re: Drz shim size
« Reply #11 on: January 08, 2018, 09:21:37 am »
Hi yes his old bike.
Bought bike from someone else. Only did 1 funduro then after cleaning bike wiring loom caught alight. Replaced all burt wires and drove it to lecap to check waterpump leak but he wasnt at work. On way back ran out of fuel. After that bike died at every robot and struggled to start. Got home remove carb to clean carb. Put back then doesnt start at all. Check valves inlet side tight on both valves. No clearance. Measure shim to 2.1mm no name on it. And found dent in shim from valve stem hiting it. Fit 1.85mm shims. Started bike all ok. Clearance now 0.2mm. Bike running with 25w 60 oil since i bought it. He fitted new filter and oil before i bought it and he apparently checked and shimmed valves. Done total of 387km on bike thus far.
Tank have small fuel leak aswell. Do any one know where can have repaired.
 

Offline Evilkinevil

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Re: Drz shim size
« Reply #12 on: January 08, 2018, 09:29:42 am »
Ive been told bike havent been used much since rebuild but some things doesnt add up.
Ive gone through all 99 pages of the drz thread to get history of the bike aswell as the amageza write up. Dates of amageza write up and the drz furom doesnt add up. Said head was sent to dirtrider for new valves and head was sent to tbr to be ported but looks like head was ported when he got the bike or just after. Also valve shims would probably been changed 5 to 10 times since new ones has been fitted. Think best would be to fit new valves asap and take it fron there.