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Old 09-25-2012, 09:39 PM   #69481
Feelers
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Quote:
Originally Posted by motolab View Post
The jet in question meters fuel to the cold start enrichment circuit.Do you mean the float needle?.Technically, BST40 carbs use cold start enrichment circuits instead of chokes (regardless of what the lettering on the lever might say). A choke is closed when an engine is cold and opened when it is warm, whereas a fuel enrichment circuit is opened when the engine is cold and closed when it is warm. A choke works by restricting the air flow, whereas an enrichment circuit works by adding extra fuel. A choke requires a fast idle cam or something akin to it (or you have to hold the throttle open manually), whereas an enrichment circuit adds a little extra air simultaneously with the extra fuel, so the fast idle is already built in. In any case, if the engine wont start from cold with the cold start enrichment lever activated, then it is likely that the fuel portion of the circuit is clogged somewhere, meaning that air will be let in (for the fast idle), but not enough fuel (making the mixture leaner instead of richer). This brings us to the jet you were cleaning. It's likely to still be dirty. On the other side of it, the fact that the engine will start from cold without the cold start enrichment circuit active means that the idle mixture is too rich, and should be readjusted when the engine is warm via the method I outlined in a previous post (or set to ~2.5-3.5% exhaust CO).

Regards,

Derek
Very interesting! Thanks for this post, Derek!
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Old 09-25-2012, 11:19 PM   #69482
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Originally Posted by neo1piv014 View Post
I didn't think anyone was saying it worked better than the expensive stuff that's actually designed specifically for cleaning carbs. I thought the general consensus was that it's good enough if you let it work long enough, and it's significantly cheaper.
cheaper yes. pine sol soak came about w/ multi cycl carb banks not needing to be taken apart and all the rubber pieces removed. it's hard to put them back togther and pine sol is safe on rubber and alum. it just transferred over to single carbs because it works too. i soaked for 1/2 a day as i had the time and did not want to work with real nasty chemicals. pinesol is pine oil w/ other ingredients.
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Old 09-25-2012, 11:53 PM   #69483
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oh man
2013 completely unchanged & $6400.
2013 klr unchanged and $6500
2013 xr650l unchanged and $?

...husky tr650 terra a few $100s more and very changed.
http://www.pistonheads.com/news/defa...?storyId=26322

the Japanese better watch themselves or bmw is taking over in a big way
you might not like the technology but alot will when comparing prices.
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Old 09-26-2012, 12:08 AM   #69484
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Originally Posted by freestate View Post
Would appreciate some quick input on the following.
I'm on a week long trip to Norway and the bike has been doing great up until this afternoon. I will try to explain it as best as I can, however English isn't my native tounge so it will be kinda hard. So bear withI me please.

This afternoon after stopping for gas the bike felt awkward when I pulled off. On low revs in first and second it made some real clonking sounds, not the usual tiny protests but much louder. Also I could feel it very clearly in the foot pegs. However when I rev it the sounds good away. In neutral the engine sounds as normal. Sorry for the crappy explanation I hope I made myself understood.
Ummm could it be the gas? Sounds a little like pinking i.e. the gas has a low octane rating... have you used that brand/countries gas before?

Were you on reserve at the time you pulled in? And was it raining? You could have got some water in the bottom of the carb. Might be worth draining the carb for a look.

Try to separate the problem - either engine or gear box. I usually work on the last thing I did before the problem started. You did not play with anything just before the problem started?

If engine pinking then it will happen in any gear - just low revs and big throttle openings. If it is pinking then keeping the revs up and the load low (less stress) should remove the problem at least for the moment. Once the fuel is say half way down in the tank, get some good fuel in there and let it mix with the other stuff.
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Old 09-26-2012, 12:56 AM   #69485
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Quote:
Originally Posted by eakins View Post
...husky tr650 terra a few $100s more and very changed.
http://www.pistonheads.com/news/defa...?storyId=26322

the Japanese better watch themselves or bmw is taking over in a big way
you might not like the technology but alot will when comparing prices.
186kg dry
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Old 09-26-2012, 03:51 AM   #69486
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Originally Posted by HerrMnnn View Post
186kg dry
According to Husky, 184kg ready to ride, full tank. http://www.husqvarna-motorcycles.com...specifications
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Old 09-26-2012, 03:58 AM   #69487
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Eek Gas tank retrofit

I have an 06 DR with a stock tank on it. I have been touring more and thinking of upgrading the fuel capacity. During some research I discovered the earlier generations came with stock fuel tanks that were much larger. Will an earlier generation fuel tank fit on the latest generation without modifications?? I was looking at the 1990 at 17ltrs would be a nice modification possibly. Any suggestions??
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Old 09-26-2012, 05:26 AM   #69488
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Quote:
Originally Posted by motolab View Post
The jet in question meters fuel to the cold start enrichment circuit.Do you mean the float needle?.
Yes


Quote:
Originally Posted by motolab View Post
Technically, BST40 carbs use cold start enrichment circuits instead of chokes (regardless of what the lettering on the lever might say). A choke is closed when an engine is cold and opened when it is warm, whereas a fuel enrichment circuit is opened when the engine is cold and closed when it is warm. A choke works by restricting the air flow, whereas an enrichment circuit works by adding extra fuel. A choke requires a fast idle cam or something akin to it (or you have to hold the throttle open manually), whereas an enrichment circuit adds a little extra air simultaneously with the extra fuel, so the fast idle is already built in. In any case, if the engine wont start from cold with the cold start enrichment lever activated, then it is likely that the fuel portion of the circuit is clogged somewhere, meaning that air will be let in (for the fast idle), but not enough fuel (making the mixture leaner instead of richer). This brings us to the jet you were cleaning. It's likely to still be dirty. On the other side of it, the fact that the engine will start from cold without the cold start enrichment circuit active means that the idle mixture is too rich, and should be readjusted when the engine is warm via the method I outlined in a previous post (or set to ~2.5-3.5% exhaust CO).

Regards,

Derek
That makes sense. I don't have access to an exhaust gas meter but my butt feels it's rich. I can fix that. The enrichment circuit jet though? Long soak in carb cleaner or see if a shop can blow it through for me? It's too small to pass anything through it i.e. nylon brush bristle
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Old 09-26-2012, 05:47 AM   #69489
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Originally Posted by thetable View Post
According to Husky, 184kg ready to ride, full tank. http://www.husqvarna-motorcycles.com...specifications
That's still stupid heavy.
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Old 09-26-2012, 06:05 AM   #69490
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That's still stupid heavy.
So is the DR, by the same reasoning. 18kg difference?
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Old 09-26-2012, 06:26 AM   #69491
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So is the DR, by the same reasoning. 18kg difference?
Uhhh, that's a huge difference when talking about motorcycles. But you're right, the DR is stupid heavy as well.
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Old 09-26-2012, 06:38 AM   #69492
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Yeah, that's a pretty big difference, and at least it's in the DR650's favor.
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Old 09-26-2012, 07:03 AM   #69493
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For most DR riders, I don't believe a 10% weight penalty will change the way they ride, but a 35% increase in HP might. If we were really that concerned about weight, we'd be riding orange or Beta red or tagging WRs or CRFXs.
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Old 09-26-2012, 07:18 AM   #69494
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I'm thinking more along the lines of hp to weight, or torque to weight, not max hp; although, I agree, the weight isn't likely to change the way they ride.

I think the DR650 has enough hp and torque to ride anywhere. It's not the power that holds the DR back as far as I'm concerned, and I think that all bikes require suspension modifications, even orange and beta red.
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Old 09-26-2012, 07:18 AM   #69495
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Quote:
Originally Posted by Thunderhart8 View Post
I have an 06 DR with a stock tank on it. I have been touring more and thinking of upgrading the fuel capacity. During some research I discovered the earlier generations came with stock fuel tanks that were much larger. Will an earlier generation fuel tank fit on the latest generation without modifications?? I was looking at the 1990 at 17ltrs would be a nice modification possibly. Any suggestions??
You'd probably have to do some custom work to get that tank to mount up correctly. Alternatively, the 4.9 gallon IMS tank works great, doesn't look out of place, and only costs around $250. You might just be better off getting an aftermarket tank that's guaranteed to bolt up.

Quote:
Originally Posted by thetable View Post
For most DR riders, I don't believe a 10% weight penalty will change the way they ride, but a 35% increase in HP might. If we were really that concerned about weight, we'd be riding orange or Beta red or tagging WRs or CRFXs.
I always love when people are talking about taking off things like passenger foot pegs and the luggage rack to save weight. It almost makes me feel guilty for wearing a heavy riding jacket. Every time I think about doing some kind of weight reduction to my bike, I think "for free, I could just go jogging for a month and lose way more weight than unbolting my passenger pegs would net me."
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