DR650 Carb Swap (pt. 5) - Adjusting the Accelerator Pump

More tuning on the TM-40 flat slide carb to try to improve fuel mileage. Making some accelerator pump adjustments, swapping the accelerator pump nozzle, and lowering the needle.
Accel pump nozzle (size 35) 🔗 amzn.to/3KzsxbC
Accel pump nozzle ( Size 40 ) 🔗 amzn.to/3R6gsNp
Accel pump nozzle ( Size 45 ) 🔗 amzn.to/3pZmDqF
Accel pump nozzle ( Size 55 ) 🔗 amzn.to/3CFvVQm
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Other videos in this series:
Part 1 - Rebuilding the Mikuni TM40 : • DR650 Carb Swap (pt 1)...
Part 2 - Making throat adapters for the TM40: • DR650 Carb Swap (pt 2)...
Part 3 - Installing TM40 and shorten cables: • DR650 Carb Swap (pt. 3...
Part 4 - Tuning the TM40: • DR650 Carb Swap (pt. 4...
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[@danlaunius7913]

Extremely helpful video, Thank you!! Apparently my TM40 still has the size 70 AP jet, it almost feels like the clutch is slipping when I goose it lmfao. I just ordered a size 40 & 45 nozzle. I will try the 40 first.

[@Michaelobama184]

I just got my pumper carburetor dialed in. What an improvement. I have stock head pipe modified mid pipe and gixxer muffler and TM40 pumper carburetor and it runs great

[@jackheinemann1994]

Good point about the emulsifier tube which I hadnt thought of before

[@mattg5585]

Awesome video as always. Lower fuel mileage may be due to all the dank wheelies you were pulling last weekend 😅

[@tvh300]

Great series, thanks for sharing!

[@sixtyfiveford]

Good info.

[@therasberry5]

You ever figured it out. Been playing with mine i think ive got a 160-165 main, needle at second lowest ( second most rich) and larger pilot. (mine was from procycle ) pulls like a train but been trying to workout the bog at 20-30% throttle.
Its open airbox,k&n, full exhaust.
Getting about 38mpg

[@DustinRogersinMO]

Yeah, in part 6 of the series.

[@bodhers]

Exhaust

[@GustavoUrena]

thanks for the info. What tank is that?

[@DustinRogersinMO]

It’s the IMS

[@booki-raw1065]

With the AP timing and adjustment I thought you don't want it to hit anything and just go straight down the carb throat ? Great series though.

[@DustinRogersinMO]

According to the Mikuni manual, you want the fuel stream to strike the needle. Thanks for watching.

[@booki-raw1065]

@@DustinRogersinMO Fantastic mate! Thanks for clarification, its been a while since you have had the TM40 on - how have you found it? Are you still happy? I am deciding if i should put one on my DR650.

[@DustinRogersinMO]

@@booki-raw1065 very happy with it. If I were to do it over, I’d buy the kit from ProCycle instead of piecing together what I needed and finding a used carb. It would have saved me loads of time/tuning.

[@tomm4603]

Any update?

[@randomOAS7]

Have you modified your airbox?

[@DustinRogersinMO]

Yes. It’s in one of the earlier videos in the series

[@yngvardharjo3704]

Get a battery motorcycle

[@DustinRogersinMO]

I’d love to. Unfortunately the range is not yet good enough for the places I ride. Most I’ve seen only are capable of 40-60 miles on a charge. We’ll do 200 mile day trips through very rural areas, where sometimes it’s questionable if you’ll find a gas station, much less a charging station.