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Old 09-29-2012, 03:32 PM   #69676
ADV8
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Quote:
Originally Posted by procycle View Post
Are you saying that one of these other needles can be used with a modified airbox and give better performance than the DJ needle? Nobody I know of who has tried this has been successful.
Quote:
Originally Posted by motolab View Post
I have been saying that all along.What are their qualifications, what equipment did they use, and what does "tried" encompass?

Regards,

Derek
Link to that needle spec please.
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Old 09-29-2012, 04:35 PM   #69677
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Quote:
Originally Posted by ADV8 View Post
Link to that needle spec please.
Derek says that the first thee needles in this diagram will work better with an open airbox than the DJ needle.
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Old 09-29-2012, 05:01 PM   #69678
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Quote:
Originally Posted by procycle View Post
Derek says that the first thee needles in this diagram will work better with an open airbox than the DJ needle.
Square inches???
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Old 09-29-2012, 05:08 PM   #69679
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Originally Posted by Andyinhilo View Post
Square inches???
Cross sectional area. One way to compare fuel flow between the needles at certain needle positions.
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Old 09-29-2012, 05:29 PM   #69680
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I lost a seat bolt(one of the rear ones).I can figure it out but does anyone know the bolt size?
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Old 09-29-2012, 05:30 PM   #69681
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M8 / 1.25 mm pitch.
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Old 09-29-2012, 06:05 PM   #69682
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Quote:
Originally Posted by procycle View Post
Derek says that the first thee needles in this diagram will work better with an open airbox than the DJ needle.
Note that the areas given are not the needle cross-sectional areas, but the area calculated to be exposed at the outlet of the emulsion tube. Also note that this diagram is from IdahoJim over at Thumpertalk.

Here are diameter measurements taken by mx_rob:



Here are the corresponding measurements for other adjustable BST40 needles:

'96-'12 Non-USA OEM DR650: 10mm: 3.00mm, 20mm: 2.97mm, 30mm: 2.70mm, 40mm: 2.43mm, 50mm: 2.19mm 59mm: 1.97mm
'92-'95 Non-USA OEM DR650: 10mm: 3.00mm, 20mm: 2.94mm, 30mm: 2.63mm, 40mm: 2.30mm, 50mm: 1.94mm, 59mm: 1.63mm
'95-'02 Aprilia Moto 6.5: 10mm: 3.00mm, 20mm: 2.94mm, 30mm: 2.52mm, 40mm: 1.99mm, 50mm: 1.53mm, 59mm: 1.23mm

Based on these measurements the first needle I would try with an open airbox would be the '96-'12 Non-USA OEM, followed by the KTM.

Regards,

Derek
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Old 09-29-2012, 06:08 PM   #69683
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Originally Posted by ADV8 View Post
M8 / 1.25 mm pitch.
Thanks Now I can do the easy way.
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Old 09-29-2012, 06:10 PM   #69684
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MX Rob did a needle comparison,need to do a search over at TT to find it though.
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Old 09-29-2012, 06:52 PM   #69685
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Originally Posted by philp38 View Post
The Pro Cycle Jet Kit and drilled slide also worked great on my 2009.

Worked perfect on my '96
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Old 09-29-2012, 06:57 PM   #69686
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I'll be putting a jet kit in, opening up the air box and hopefully getting some new exhaust this winter.

You guys keep talking about drilling the slide? Any pictures or write ups anywhere?
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Old 09-29-2012, 07:02 PM   #69687
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Originally Posted by neo1piv014 View Post
I've drooled over that 790cc kit many times. I just haven't heard that much about it from people who have actually installed it. The one youtube video I found about it was just really awful footage of a dude riding around town with what appeared to be a cellphone taped on his chest recording. I'll probably do the TM40 carb before I do anything that major to my engine. Since it's my daily driver, I can't really afford to ship half my engine out of state to be bored out and resleeved....yet
On DRriders, i asked that same question, all the replies were favorable, with one guy almost staying with a Duc monster 800, only a couple of bike lengths behind, as i recall. When i get some money and time that will be my next mod.
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Old 09-29-2012, 07:06 PM   #69688
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Originally Posted by neo1piv014 View Post
I like the Corbin seat alright. It isn't soft at all, but if you like those scooped out wooden chairs that a lot of folks have in their kitchen (and I do), it's a definite upgrade over stock. As for windscreens, the PO put a Cee Bailey on the front of my bike that was just massive. It looked a little strange, and because it was so big, it actually moved around a bit in the wind, causing massive buffeting. I wound up just taking it off entirely, and I just live with the wind blast at speed. Because the air is much smoother flowing now, it's actually less tiring than the windscreen was. If you're committed to putting a windscreen on yours, get a small one.
I've got the Britannia Composites Lynx it stops at least 90 percent of the blast, and the Hella lights are worth the whole fairing in themselves, one great product, I recommend it. Corbin seats are like sitting on a brick, plus the fiberglass seat pan is very heavy.
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Old 09-29-2012, 07:10 PM   #69689
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Quote:
Originally Posted by greener556 View Post
I'll be putting a jet kit in, opening up the air box and hopefully getting some new exhaust this winter.

You guys keep talking about drilling the slide? Any pictures or write ups anywhere?
The DR BST has two holes in the slide, one for the needle another for air. Drilling the slide adds a second hole for air, making the slide 'jump up-n-down' faster. This pic is for a KTM, ignore the 'Drill these 2 holes to 0.125'.

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Old 09-29-2012, 07:16 PM   #69690
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Awesome, I did a google search and found a few write ups as well.
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