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Search took 0.09 seconds. Search: Posts Made By: motolab
Forum: Thumpers 06-06-2013, 10:49 AM
Replies: 1,342
Views: 191,467
Posted By motolab
It is an assembly, however it can be taken apart...

It is an assembly, however it can be taken apart for needle inspection. If the tip has a witness line where it has been contacting the seat (check with and without magnification), the float valve...
Forum: Thumpers 06-06-2013, 10:46 AM
Replies: 1,342
Views: 191,467
Posted By motolab
I would replace the slide guide as emulsion tube...

I would replace the slide guide as emulsion tube wear usually sets in when the depressions in the bottom of the slide guide concentric to the bore are .010" or less deep.Using the tail of a caliper,...
Forum: Thumpers 06-05-2013, 06:12 PM
Replies: 1,342
Views: 191,467
Posted By motolab
How deep are the depressions in the bottom...

How deep are the depressions in the bottom corners of the slide guide concentric to the bore?I would replace the slide.Yes. I would replace it with a non-USA adjustable OEM needle because:

1) It's...
Forum: Thumpers 06-05-2013, 05:29 PM
Replies: 1,342
Views: 191,467
Posted By motolab
A cross wind blowing over this one could cause a...

A cross wind blowing over this one could cause a momentary vacuum in the float bowl.This one should have a filter attached to the end.

Regards,

Derek
Forum: Thumpers 06-04-2013, 08:41 PM
Replies: 1,342
Views: 191,467
Posted By motolab
Did the re-jetting include drilling the slide...

Did the re-jetting include drilling the slide lift holes and/or installing a DynoJet jet needle?Has the airbox been opened anywhere other than the top? Where do the carb breather hoses...
Forum: Thumpers 06-04-2013, 01:44 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
Unfortunately Dynojet dynos use O2 sensors for...

Unfortunately Dynojet dynos use O2 sensors for tuning, which is not all that useful. Here's a brief overview:

1) There is no direct relationship between O2 content and AFR.
2) Even when the...
Forum: Thumpers 06-04-2013, 12:32 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
If that's the case, then choosing a DynoJet dyno...

If that's the case, then choosing a DynoJet dyno was not in alignment with your stated purpose.

Regards,

Derek
Forum: Thumpers 06-04-2013, 11:04 AM
Replies: 77,920
Views: 14,214,774
Posted By motolab
HP is determined by simple measurements and...

HP is determined by simple measurements and simple math. For a given measuring location (i.e. crank, output shaft, tire), there is therefore a correct as well as an incorrect result. Mark Dobeck has...
Forum: Thumpers 06-03-2013, 09:49 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
Measured where and by what method?Dynojet HP are...

Measured where and by what method?Dynojet HP are very optimistic.

Regards,

Derek
Forum: Thumpers 06-03-2013, 09:26 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
I don't find that number to be believable,...

I don't find that number to be believable, certainly not at the tire.At the rear tire, I don't find 70 hp to be believable either.While being air-cooled and running on pump gas.

Regards,

Derek
Forum: Thumpers 06-03-2013, 08:36 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
You'd need liquid cooling to do that, and you'd...

You'd need liquid cooling to do that, and you'd still have a tough time getting to 70 hp.

Regards,

Derek
Forum: Thumpers 05-26-2013, 11:30 AM
Replies: 1,342
Views: 191,467
Posted By motolab
Congratulations, Sir! Regards, Derek

Congratulations, Sir!

Regards,

Derek
Forum: Thumpers 05-25-2013, 03:49 PM
Replies: 361
Views: 26,449
Posted By motolab
The procedure I recommend when gas analysis is...

The procedure I recommend when gas analysis is not available is:

Adjust fuel screw to 2-½ turns out from lightly seated. Start the engine, let it warm up and ride the bike around until it's hot....
Forum: Thumpers 05-25-2013, 12:00 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
I can think of at least two cases where a K&N...

I can think of at least two cases where a K&N drop-in filter flows less air than stock.That may be true for off-road racing (which is of course what's relevant to this thread), but for road racing...
Forum: Thumpers 05-25-2013, 11:55 AM
Replies: 77,920
Views: 14,214,774
Posted By motolab
I don't follow. Regards, Derek

I don't follow.

Regards,

Derek
Forum: Thumpers 05-25-2013, 10:43 AM
Replies: 77,920
Views: 14,214,774
Posted By motolab
Is it possible that you meant "alluded"? ...

Is it possible that you meant "alluded"?

Regards,

Derek
Forum: Thumpers 05-24-2013, 01:11 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
In some applications K&N filters flow more than...

In some applications K&N filters flow more than stock and in some they don't.

In the ones that they do, there being "no special requirement" is nice to say, but more flow means leaner mixture,...
Forum: Thumpers 05-24-2013, 09:55 AM
Replies: 361
Views: 26,449
Posted By motolab
That would be quite a bit too lean for my tastes....

That would be quite a bit too lean for my tastes.

Regards,

Derek
Forum: Thumpers 05-24-2013, 09:51 AM
Replies: 16,324
Views: 1,979,628
Posted By motolab
It's not the petcock's fault alone, but primarily...

It's not the petcock's fault alone, but primarily the float valve's (after all the petcock is open when the engine is running, and something must stop the overflowing then, right?).

Regards,
...
Forum: Thumpers 05-24-2013, 08:00 AM
Replies: 77,920
Views: 14,214,774
Posted By motolab
I thought that was before you had put the bike on...

I thought that was before you had put the bike on the dyno.

Regards,

Derek
Forum: Thumpers 05-23-2013, 07:13 PM
Replies: 361
Views: 26,449
Posted By motolab
What is the float height and what was the fuel...

What is the float height and what was the fuel screw setting procedure at your home altitude?

Regards,

Derek
Forum: Thumpers 05-23-2013, 02:31 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
This "float weight" thing has confusion caused...

This "float weight" thing has confusion caused for a number of people. If you saw the term used in the BST40 bible, it's an incorrect term, and I'm not sure what it was originally supposed to refer...
Forum: Thumpers 05-23-2013, 10:36 AM
Replies: 16,324
Views: 1,979,628
Posted By motolab
You'd normally put the close coils on the...

You'd normally put the close coils on the unsprung end (the close coils otherwise add sprung weight).

Regards,

Derek
Forum: Thumpers 05-23-2013, 10:27 AM
Replies: 77,920
Views: 14,214,774
Posted By motolab
Yes. You did say it in a previous post. I saw it...

Yes. You did say it in a previous post. I saw it and promptly forgot.That's obviously for you to decide, but I would have recommended continuing/widening the search. Did you make inquiries with...
Forum: Thumpers 05-22-2013, 09:25 PM
Replies: 1,342
Views: 191,467
Posted By motolab
I didn't say anything whatsoever about who...

I didn't say anything whatsoever about who performed the airbox modifications.With the stock intake configuration it may be OK. With the snorkel removed and airbox opened up, I don't think so. With...
Forum: Thumpers 05-22-2013, 09:15 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
Another DR650 engine that pings.Thanks for...

Another DR650 engine that pings.Thanks for clarifying. (R+M/2) is the standard in the US, and the numbers are not comparable to RON.

Regards,

Derek
Forum: Thumpers 05-22-2013, 04:11 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
Thanks for clarifying. Regards, Derek

Thanks for clarifying.

Regards,

Derek
Forum: Thumpers 05-22-2013, 01:05 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
Part throttle should be tuned with the...

Part throttle should be tuned with the responsible circuits, not with the fuel screw.

Regards,

Derek
Forum: Thumpers 05-22-2013, 01:02 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
While that's technically correct, the difference...

While that's technically correct, the difference is greater the more the throttle is closed and therefore the higher the vacuum that is trying to suck fuel past the exposed area adjacent to the tip...
Forum: Thumpers 05-22-2013, 12:56 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
Not necessarily. Regards, Derek

Not necessarily.

Regards,

Derek
Forum: Thumpers 05-22-2013, 12:51 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
And we have another one. To clarify, this is...

And we have another one.

To clarify, this is 95 RON rather than 95 (R+M)/2, right?

Regards,

Derek
Forum: Thumpers 05-22-2013, 12:46 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
Aha. So that brings up the question of why Suzuki...

Aha. So that brings up the question of why Suzuki would go to a nickel-plated emulsion tube.

Regards,

Derek
Forum: Thumpers 05-22-2013, 12:41 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
They're not. Regards, Derek

They're not.

Regards,

Derek
Forum: Thumpers 05-22-2013, 12:40 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
Unfortunately no CO traces. Regards, ...

Unfortunately no CO traces.

Regards,

Derek
Forum: Thumpers 05-22-2013, 12:36 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
On some bikes that's not the case at all. ...

On some bikes that's not the case at all.

Regards,

Derek
Forum: Thumpers 05-22-2013, 12:17 PM
Replies: 1,342
Views: 191,467
Posted By motolab
Since the pre high-flow head models are severely...

Since the pre high-flow head models are severely prone to detonation in stock form, I would not take any measures (including removing the snorkel) whatsoever to increase cylinder filling (and...
Forum: Thumpers 05-19-2013, 02:40 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
OK, so just to make sure I understand, your NZ/AU...

OK, so just to make sure I understand, your NZ/AU DR650 came with a bare brass emulsion tube, but the NZ/AU spec replacement is nickel plated?

Regards,

Derek
Forum: Thumpers 05-19-2013, 10:01 AM
Replies: 1,342
Views: 191,467
Posted By motolab
I didn't post any pictures at the beginning of...

I didn't post any pictures at the beginning of this thread.

The spacer is supposed to be round. The step in the floor of the slide is there so that the needle can pivot out of the way to an...
Forum: Thumpers 05-18-2013, 08:32 PM
Replies: 77,920
Views: 14,214,774
Posted By motolab
As far as I can tell, all markets except the US...

As far as I can tell, all markets except the US don't have nickel plated emulsion tubes. I think it's interesting to consider why that might be.

Regards,

Derek
Forum: Thumpers 05-18-2013, 06:18 PM
Replies: 1,342
Views: 191,467
Posted By motolab
OK, but what's "half" about it? Regards, ...

OK, but what's "half" about it?

Regards,

Derek
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