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Author Topic: Older DR 600/650 thread (Pre mid 90's)  (Read 35389 times)

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Offline Veemax

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #420 on: January 23, 2012, 09:48:43 am »
Rule # 1

The Japs are clever people

Set the bike up standard as a starting point , check everything is working properly , get it to start, run. idle ....

Tweak for those last horses and invest time on optimising once you confirm the engine is a goodie, which we hope for !

Optimum Stochiometric Ratio will give best power, going rich on the main at this point is not what I'd do, given your altitude.

Even at sea level I don't find the 137.5 lean with open pipe ....  but I do have stock airbox+snorkle ....

Check the valves dude, and when you have a spanner on the crank, feel that compression !!!
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Offline lecap

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #421 on: January 23, 2012, 10:08:36 am »
Clutch slip , I had clutch slip too, refer/search back to proper assembly of those steel rings , if not that then plates are either worn or contaminated with slip additive from using the wrong oil. I put in new plates and my clutch is settling in nicely from being obviously a little grabbly at first.

My Master Mechanic friends says those notches one often sees in the basket thrust edges, are not known to impact clutch slipping ....

Note that bad friction discs in your clutch don't necessarily measure below spec. Overheating the clutch lowers the friction coefficient of the discs an effect similar to glazing of brake pads. If the clutch slips on hard acceletation at higher rpm in top gear replace the friction discs.

Thrust marks in the clutch basket and hub spline surfaces causes jerky and difficult to control engagement of the clutch. The worse the marks the more difficult it gets to slip the clutch sensibly. It might also cause the clutch to drag when disengaged and make gearshifts noisy and downshifts sticky and neutral difficult to find although this is typically caused by corroded or warped steel discs.
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Offline Wildcoast

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #422 on: January 23, 2012, 10:31:02 am »
Volroom DB9 has a link to the service manual on this thread, downloaded it quick quick this morning, explains balance chain and valve clearance very well.

Okay, I'll get some pricing on the clutch story, seals etc, my airfilter is brand new, bike has compression, does not use a drop of oil, think Volroom's bikes motor is still strong as well, when I rode it it pulled nicely, maybe needs a few tweaks for the mid range but I thought it pulled well.

 

Offline volroom

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #423 on: January 23, 2012, 04:49:35 pm »
Rule # 1

The Japs are clever people

Set the bike up standard as a starting point , check everything is working properly , get it to start, run. idle ....

Tweak for those last horses and invest time on optimising once you confirm the engine is a goodie, which we hope for !

Optimum Stochiometric Ratio will give best power, going rich on the main at this point is not what I'd do, given your altitude.

Even at sea level I don't find the 137.5 lean with open pipe ....  but I do have stock airbox+snorkle ....

Check the valves dude, and when you have a spanner on the crank, feel that compression !!!

Ok, after the exhaust leak is sorted I'll remove the snorkel just to see whether the end torque increases. If it does - then I know that it is running too rich at high revs possibly due to bigger main jet and richer setting on needle.

In the end it might take a while, hey? Love the fact that I'm learning though - never saw chance for a carb before.
What mods did you make to your BST-40 exactly Veemax? And LeCap - need some comment on the Dunlop D606's pls.
« Last Edit: January 23, 2012, 05:04:59 pm by volroom »
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Offline volroom

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #424 on: January 23, 2012, 04:52:03 pm »
Volroom DB9 has a link to the service manual on this thread, downloaded it quick quick this morning, explains balance chain and valve clearance very well.

Okay, I'll get some pricing on the clutch story, seals etc, my airfilter is brand new, bike has compression, does not use a drop of oil, think Volroom's bikes motor is still strong as well, when I rode it it pulled nicely, maybe needs a few tweaks for the mid range but I thought it pulled well.



Thx WC, will pm DB9. She pulls OKish...but honestly  - in top gear, slight very slight hilll at around 110-120km/h - you can open throttle wide and absolutely nothing happens. Veemax says with the pre-96 (hot cam) this should not be so

BTW at around 120 I'm doing just over 5000RPM
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Offline DeepBass9

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #425 on: January 23, 2012, 05:04:53 pm »
Here's the link again for the service manual. I'm going to put it on the 1st post on this thread as well :  http://www.dreamlodge.co.za/1990-1995_DR650_Service_Manual.pdf

Offline volroom

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #426 on: January 23, 2012, 05:35:57 pm »
Got the service manual, thx DP9. see the API rating on oil used should be SE or SF...that is supposedly low quality oil. the s is for spark ignition (c would be form compression ignition - diesel), the second letter shows quality of oil, the further down the alphabet the better quality oil - that's what I understand. So...do you use SE SF oil?
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Offline Wildcoast

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #427 on: January 23, 2012, 05:43:16 pm »
Been running around a bit today doing chores, collecting scrap steel and ordering parts etc. In order not to waste a day totally I slapped a pooratech rear brake master cylinder guard together from some old scrap angle.

Volroom did you watch that movie yet?  :ricky:
 

Offline volroom

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #428 on: January 23, 2012, 05:50:19 pm »
Been running around a bit today doing chores, collecting scrap steel and ordering parts etc. In order not to waste a day totally I slapped a pooratech rear brake master cylinder guard together from some old scrap angle.

Volroom did you watch that movie yet?  :ricky:


Will do, will do.. sent you a pm. Teaching keeps me buisy...or is that WD forum keep me buisy..
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Offline volroom

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #429 on: January 23, 2012, 05:58:19 pm »
Now the service manual says I put in the wrong plugs.. does anyone have a code (NGK) for the plugs that should be used? think those i've got in is DEA 8
Manual says last nr should be 9..
2003 R1150GS
 

Offline Wildcoast

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #430 on: January 23, 2012, 06:06:45 pm »
You mean I burned my hands playing with the mixture screw to set it up for the wrong blerrie plugs?  :imaposer:
 

Offline volroom

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #431 on: January 23, 2012, 06:13:00 pm »
You mean I burned my hands playing with the mixture screw to set it up for the wrong blerrie plugs?  :imaposer:

frieken seems like it...sorry, but if possible I'll just keep en in..
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Offline Wildcoast

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #432 on: January 23, 2012, 07:13:34 pm »
Any advise on what temperatures a CDI unit generates? I need to move mine, was thinking under my seat on the tailpiece (resting on plastic) is this a good idea?
 

Offline lecap

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #433 on: January 24, 2012, 09:11:03 am »
CDI does not get significantly warm and also does not like large amounts of heat. Put anywhere you want and as far away from exhaust header and silencer as possible.
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Offline Wildcoast

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #434 on: January 24, 2012, 10:05:21 am »
Thanks Le Cap
 

Offline volroom

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #435 on: January 24, 2012, 10:31:14 am »

Got the service manual, thx DP9. see the API rating on oil used should be SE or SF...that is supposedly low quality oil. the s is for spark ignition (c would be form compression ignition - diesel), the second letter shows quality of oil, the further down the alphabet the better quality oil - that's what I understand. So...do you use SE SF oil?
2003 R1150GS
 

Offline volroom

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #436 on: January 24, 2012, 10:32:13 am »

Now the service manual says I put in the wrong plugs.. does anyone have a code (NGK) for the plugs that should be used? think those i've got in is DEA 8
Manual says last nr should be 9..
2003 R1150GS
 

Offline Veemax

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #437 on: January 24, 2012, 04:29:57 pm »

Now the service manual says I put in the wrong plugs.. does anyone have a code (NGK) for the plugs that should be used? think those i've got in is DEA 8
Manual says last nr should be 9..


My manual ( 1992 publishing ) says

NGK DP8EA9 , hotter plug for Canadian cold ???
NGK DP9EA9 = default

Gap 0.8-0.9



(Tiger1050/DR650SE/DR650ES/VS800/VZ800/LS650/XLX350R/GN400-tracker/YZX200)

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Offline lecap

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #438 on: January 25, 2012, 08:52:03 am »

Got the service manual, thx DP9. see the API rating on oil used should be SE or SF...that is supposedly low quality oil. the s is for spark ignition (c would be form compression ignition - diesel), the second letter shows quality of oil, the further down the alphabet the better quality oil - that's what I understand. So...do you use SE SF oil?


API SE and SF have been superseded decades  ago.

Current and valid service classes are SJ, SL and SM with the first two principially being suitable for bike engines.

You might find some El Cheapo oils which are labeled API service class SG too but that's obsolete too.

JASO SM has basically replaced all earlier and current API service classes and at least the Japanese manufacturers and KTM recommend to run their bikes on JASO MA spec oil regardless what year model.

And use 10W40 or 10W50.
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Offline volroom

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Re: Older DR 600/650 thread (Pre mid 90's)
« Reply #439 on: January 25, 2012, 09:53:25 am »
Thx LeCap, the reason why 20W50 should not be used is because it takes a while for these engines to warm up, right? Using 20W50 does not give sufficient lubrication at low temperatures.

D606 Comment Le Cap?
Is the Kings rear that Veemax put on a 6 ply tyre?

Veemax, thx. It basically means i've got the wrong plugs in. Mine ends with 8 - not 9, LeCap - what difference is there then? should I change plugs again?

Thx

BTW WC, I checked mondo Enduro last night...awesome!! Those guys were HARDCORE..
2003 R1150GS