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Search: Posts Made By: motolab
Forum: Thumpers Yesterday, 11:37 AM
Replies: 236
Views: 52,008
Posted By motolab
From the top. Regards, Derek

From the top.

Regards,

Derek
Forum: Thumpers Yesterday, 11:36 AM
Replies: 236
Views: 52,008
Posted By motolab
Great!Not likely.Yes.No.You're welcome! ...

Great!Not likely.Yes.No.You're welcome!

Regards,

Derek
Forum: Thumpers 03-25-2015, 08:29 PM
Replies: 2,104
Views: 357,698
Posted By motolab
Adjustment procedure after having replaced worn...

Adjustment procedure after having replaced worn parts, rectified the overflowing problem, and having set float height to 14.7mm via a float height adjustment tool:

Coming from the lean side,...
Forum: Vendors 03-25-2015, 01:19 PM
Replies: 95
Views: 24,313
Posted By motolab
I have a very nice used one you can have for...

I have a very nice used one you can have for $35.00.

Regards,

Derek
Forum: Vendors 03-25-2015, 12:09 PM
Replies: 95
Views: 24,313
Posted By motolab
What model is this for? Regards, Derek

What model is this for?

Regards,

Derek
Forum: Thumpers 03-25-2015, 10:18 AM
Replies: 2,104
Views: 357,698
Posted By motolab
On a pre-high flow model breathing improvements...

On a pre-high flow model breathing improvements should be limited to the exhaust side unless other significant measures are undertaken to counter the detonation problems that improved intake flow...
Forum: Thumpers 03-25-2015, 09:36 AM
Replies: 236
Views: 52,008
Posted By motolab
The Iridium plug is easier to fire and has a 30K+...

The Iridium plug is easier to fire and has a 30K+ mile lifespan.

Regards,

Derek
Forum: Thumpers 03-24-2015, 05:37 PM
Replies: 11
Views: 475
Posted By motolab
Fixing the part throttle leanness via the non-USA...

Fixing the part throttle leanness via the non-USA adjustable jet needle improves power, driveability, engine life (lean mixtures can cause detonation problems), and possibly mileage.

The oiled...
Forum: Thumpers 03-24-2015, 10:06 AM
Replies: 2,104
Views: 357,698
Posted By motolab
Can you tell me where you're getting hung...

Can you tell me where you're getting hung up?You're welcome.

Regards,

Derek
Forum: Thumpers 03-23-2015, 07:57 PM
Replies: 11
Views: 475
Posted By motolab
Non-USA adjustable jet needle to fix the part...

Non-USA adjustable jet needle to fix the part throttle leanness, an oiled Uni under-diaphragm vent filter to keep dirt out of the carburetor (and engine) and extend slide guide, slide emulsion tube &...
Forum: Thumpers 03-23-2015, 07:49 PM
Replies: 236
Views: 52,008
Posted By motolab
Great!Make sure the under-diaphragm vent filter...

Great!Make sure the under-diaphragm vent filter is oiled.Drill the plug with a #19 drill using a depth stop so that the drill barely breaks through the other side of the plug (if you don’t use a...
Forum: Thumpers 03-23-2015, 04:26 PM
Replies: 236
Views: 52,008
Posted By motolab
I do. They are listed near the bottom of the...

I do. They are listed near the bottom of the first post at http://advrider.com/forums/showthread.php?t=528038.

Regards,

Derek
Forum: Thumpers 03-23-2015, 01:59 PM
Replies: 236
Views: 52,008
Posted By motolab
At 4K miles, wear items such as the slide guide,...

At 4K miles, wear items such as the slide guide, emulsion tube & slide (unless it's been drilled) should be in good condition. So far, I therefore recommend a rebuild kit, a fresh pilot jet (people...
Forum: Thumpers 03-23-2015, 11:53 AM
Replies: 236
Views: 52,008
Posted By motolab
How many miles are there on the carburetor? Was...

How many miles are there on the carburetor? Was the bike stored for any length of time? Can you check to see if the airbox is unmodified and the snorkel is in place?

Regards,

Derek
Forum: Thumpers 03-23-2015, 10:53 AM
Replies: 2,104
Views: 357,698
Posted By motolab
Increasing cylinder filling on a pre-high flow...

Increasing cylinder filling on a pre-high flow model isn't a good idea unless significant measures have been undertaken to eliminate the detonation that such a change will otherwise cause.Did you...
Forum: Thumpers 03-22-2015, 11:51 PM
Replies: 2,104
Views: 357,698
Posted By motolab
Perhaps he will clarify.The DR650 emulsion tube...

Perhaps he will clarify.The DR650 emulsion tube has an outlet that is nine sizes larger than the LC4's.The bleed hole size looks similar, but the LC4 item has two more of them.Agreed.

Regards,
...
Forum: Thumpers 03-22-2015, 12:50 PM
Replies: 2,104
Views: 357,698
Posted By motolab
Hello Gunner, I've reviewed Brian7cees post...

Hello Gunner,

I've reviewed Brian7cees post several times now, and I'm having trouble locating the proposed modifications you might be referring to. Would you be willing to help me out?
...
Forum: Thumpers 03-22-2015, 12:38 PM
Replies: 2,104
Views: 357,698
Posted By motolab
http://www.advrider.com/forums/showthread.php?t=52...

http://www.advrider.com/forums/showthread.php?t=528038A 155 or 160 main jet will be way too large for an otherwise stock engine.Slide guide wear is pretty much proportional to lift hole area, so ...
Forum: Thumpers 03-17-2015, 11:16 AM
Replies: 6,893
Views: 1,250,552
Posted By motolab
Perhaps things have changed since, but Regina...

Perhaps things have changed since, but Regina chains have the shortest life of any chain I've tried.

Regards,

Derek
Forum: Thumpers 03-17-2015, 10:40 AM
Replies: 6,893
Views: 1,250,552
Posted By motolab
I second the endorsement of DID chains. In my...

I second the endorsement of DID chains. In my experience they're the only ones that consistently stand up to steady state dynamomenter testing of higher horsepower applications (100+).

Regards,
...
Forum: Thumpers 03-16-2015, 09:29 AM
Replies: 2,104
Views: 357,698
Posted By motolab
A good full system plus a reduction in piston...

A good full system plus a reduction in piston surface area & compression (see http://www.moto-lab.com/gallery/view?itemid=309) aren't enough. I made both of these changes and then tested 91 octane ...
Forum: Thumpers 03-13-2015, 11:00 PM
Replies: 6,893
Views: 1,250,552
Posted By motolab
The item in the diagram includes the slide...

The item in the diagram includes the slide diaphragm, which is rarely ever needed, but does not include the float needle, which when worn is one of the prime causes of overflowing problems.
...
Forum: Thumpers 03-13-2015, 10:55 PM
Replies: 2,104
Views: 357,698
Posted By motolab
'96 and up OEM US model DR650 emulsion tubes are...

'96 and up OEM US model DR650 emulsion tubes are nickel plated, which does improve wear resistance.

Regards,

Derek
Forum: Thumpers 03-13-2015, 12:21 PM
Replies: 2,104
Views: 357,698
Posted By motolab
These stock settings are probably OK as a...

These stock settings are probably OK as a starting point, but you will probably need to iterate from there.The fuel screw adjustment procedure again:

With the engine all the way warmed up, set CO...
Forum: Thumpers 03-13-2015, 11:29 AM
Replies: 2,104
Views: 357,698
Posted By motolab
Unless the slide guide has worn to a point where...

Unless the slide guide has worn to a point where some or all of the indentations are no longer visible, the depth of the depressions in the bottom corners must be measured.The slide is in good...
Forum: Thumpers 03-12-2015, 09:02 PM
Replies: 2,104
Views: 357,698
Posted By motolab
The improved cylinder filling from the cut airbox...

The improved cylinder filling from the cut airbox brings with it increased detonation risk, especially when combined with the big bore kit (unless it lowers the compression ratio significantly).Slide...
Forum: Thumpers 03-12-2015, 08:49 PM
Replies: 2,104
Views: 357,698
Posted By motolab
Stock settings: Float height 14.7mm, main jet...

Stock settings: Float height 14.7mm, main jet 140, pilot jet 42.5, fuel screw 1-1/2 turns.Installing a big bore kit doesn't automatically require larger jets. In fact the opposite may be true, as the...
Forum: Thumpers 03-12-2015, 08:23 PM
Replies: 2,104
Views: 357,698
Posted By motolab
I don't recommend the DynoJet needle that comes...

I don't recommend the DynoJet needle that comes in the Procycle kit because:

1) It's tapered unnecessarily sharply and is likely to produce a significant variance in mixture strength...
Forum: Thumpers 03-12-2015, 02:54 PM
Replies: 236
Views: 52,008
Posted By motolab
I don't know of a good way to do it without a...

I don't know of a good way to do it without a tachometer. I use digital type with a clamp on lead or one that works off of intake pulses in case the ignition is too noisy for the former to work.
...
Forum: Thumpers 03-12-2015, 01:56 PM
Replies: 2,104
Views: 357,698
Posted By motolab
I usually put the instructions inside the...

I usually put the instructions inside the package. In case I forgot to do that:

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Forum: Thumpers 03-12-2015, 01:52 PM
Replies: 236
Views: 52,008
Posted By motolab
I recommend replacing the pilot jet, setting the...

I recommend replacing the pilot jet, setting the float height at exactly 14.7mm, and because the USA jet needle is too lean, installing a non-USA version at the 4th clip position. Then adjust the...
Forum: Thumpers 03-12-2015, 12:20 PM
Replies: 236
Views: 52,008
Posted By motolab
The BST40 carburetor has a fuel screw. It's...

The BST40 carburetor has a fuel screw. It's located inside a downward facing well, downstream of the float bowl. If the brass plug were still installed, that might make it more difficult to locate.
...
Forum: Thumpers 03-12-2015, 12:10 PM
Replies: 2,104
Views: 357,698
Posted By motolab
A pre-high flow model is pretty much guaranteed...

A pre-high flow model is pretty much guaranteed to detonate itself to death with the airbox lid removed unless major changes are made to move it out of the danger zone.How are you going about...
Forum: Thumpers 03-12-2015, 12:05 PM
Replies: 2,104
Views: 357,698
Posted By motolab
Yes, wear on the jet needle indicates that the...

Yes, wear on the jet needle indicates that the slide was supported in the downstream direction by the needle in the emulsion tube rather than by the slide guide, meaning that the slide guide is worn...
Forum: Vendors 03-11-2015, 07:41 PM
Replies: 95
Views: 24,313
Posted By motolab
'96-'14 DR650 & '91-'98 non-USA GSX-R1100 diaghragm cover

I now have in stock:

13502-41C00 Diaphragm Cover.

Added them above as well, so the list is complete.

Regards,

Derek
Forum: Vendors 03-10-2015, 10:28 PM
Replies: 95
Views: 24,313
Posted By motolab
'90-'95 DR650 throttle slide

I now have in stock:

13501-12D00 Valve, Piston.

Added it above as well, so the list is complete.

Regards,

Derek
Forum: Thumpers 03-08-2015, 07:34 PM
Replies: 236
Views: 52,008
Posted By motolab
It's available in stock from other sources.BST40...

It's available in stock from other sources.BST40 carburetors have cold start enrichment circuits instead of chokes. A choke is closed when an engine is cold and opened when it is warm, whereas a ...
Forum: Thumpers 03-02-2015, 12:03 AM
Replies: 26,308
Views: 4,721,233
Posted By motolab
I'm supposed to have a nice day after being...

I'm supposed to have a nice day after being insulted?

Regards,

Derek
Forum: Thumpers 03-01-2015, 11:55 PM
Replies: 26,308
Views: 4,721,233
Posted By motolab
In my experience the pump stroke need not be...

In my experience the pump stroke need not be limited once the correct jet needle base diameter is employed.

Regards,

Derek
Forum: Thumpers 03-01-2015, 11:41 PM
Replies: 26,308
Views: 4,721,233
Posted By motolab
1) There is no direct relationship between O2...

1) There is no direct relationship between O2 content and AFR.
2) Even when the mixture cannot be improved, O2 content can and does vary from "ideal".
3) The O2 content can be "perfect" while...
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