Author Topic: TM32 conversion 75 RD350B  (Read 1185 times)

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Offline tim steele

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TM32 conversion 75 RD350B
« on: March 14, 2021, 01:01:14 AM »
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Tim Steele in Front Royal. VA

Offline Doug_R5C

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Re: TM32 conversion 75 RD350B
« Reply #1 on: March 15, 2021, 11:40:35 AM »
It goes well, but boring roads for an RD350.

Offline tim steele

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Re: TM32 conversion 75 RD350B
« Reply #2 on: March 15, 2021, 01:39:32 PM »
Yeah that stretch of road is pretty tame. Check out some of my other ride videos. We do have some nice motorcycle riding roads here in Northern Virginia.
I Love The Smell Of Blue Marble In The Morning!!!
Tim Steele in Front Royal. VA

Online tore

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Re: TM32 conversion 75 RD350B
« Reply #3 on: March 15, 2021, 03:49:35 PM »
Must be something more then TM32 and new jets to that bike
Tore

Suzuki T20 1969
RD350B (Indonesia) 1975
BMW R1150GS Adv 2004
HVA Roulette 1957
NV 125 1955
https://www.youtube.com/watch?v=k85mRPqvMbE

Offline tim steele

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Re: TM32 conversion 75 RD350B
« Reply #4 on: March 16, 2021, 02:07:15 AM »
It has Moto Carrera Millennium GP expansion chambers and a Vintage Smoke (Dyna) ignition. 1st over on a fresh not new top end. Stock porting.
I Love The Smell Of Blue Marble In The Morning!!!
Tim Steele in Front Royal. VA

Offline tim steele

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Re: TM32 conversion 75 RD350B
« Reply #5 on: March 16, 2021, 02:10:08 AM »
http://www.2strokeworld.net/forum/index.php?topic=2840.0
Here is the link to the install and subsequent top end replacement.
I Love The Smell Of Blue Marble In The Morning!!!
Tim Steele in Front Royal. VA

Online 5port

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Re: TM32 conversion 75 RD350B
« Reply #6 on: March 16, 2021, 10:32:47 AM »
Yes, interesting.  There is no doubt that different carbs have different results.  Some good details in the thread on your link.  I looked at this type of modification and, it is not cheap if you buy gen Mikuni/Keihin carbs and the special reed rubbers and only really suitable for foam filters.  Certainly lots of discussion about the pro's and Con's of fslide conversions on other forums. 
Overall, there is good data on tuning with OE roundslide VM's for the RD.  You can certainly do the Primary conversion for £40 per carb with new gen Mikuni brass on the OE VM28 and that suits quite high tuning.  Dale Alexander preferred the VM28 bored to 29mm better than larger carbs for his USA road racing RD350's.  :)

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Online tore

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Re: TM32 conversion 75 RD350B
« Reply #7 on: March 16, 2021, 12:25:12 PM »
http://www.2strokeworld.net/forum/index.php?topic=2840.0
Here is the link to the install and subsequent top end replacement.

Thanks for the jetting info. Very helpful :-)

Btw, interesting way to handle the throttle springs. I think it may be a bit easier if you screw the spring instead of pinching it. I usually put the cables in the throttles and insert the small plastic cable lock without the springs. Then I just screw the spring in place :)
Tore

Suzuki T20 1969
RD350B (Indonesia) 1975
BMW R1150GS Adv 2004
HVA Roulette 1957
NV 125 1955
https://www.youtube.com/watch?v=k85mRPqvMbE

Offline tim steele

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Re: TM32 conversion 75 RD350B
« Reply #8 on: March 16, 2021, 07:34:46 PM »
You are welcome. Very interesting method you described for the springs.
I Love The Smell Of Blue Marble In The Morning!!!
Tim Steele in Front Royal. VA

Offline tim steele

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Re: TM32 conversion 75 RD350B
« Reply #9 on: March 22, 2021, 07:21:20 PM »
https://sendvid.com/39elkvrr?secret=769287c3-e80a-4b5b-97ed-a1dd87e0e312

Several test rides later moved the needle 1 clip lean. Test ride tomorrow. Before you had to be quick to get the enricheners off to avoid plug fouling. Now you have to leave them on for 30 seconds or so until the engine speed starts to slow a bit before pushing them off.
I Love The Smell Of Blue Marble In The Morning!!!
Tim Steele in Front Royal. VA

Offline tim steele

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Re: TM32 conversion 75 RD350B
« Reply #10 on: March 27, 2021, 12:58:40 PM »
I Love The Smell Of Blue Marble In The Morning!!!
Tim Steele in Front Royal. VA

Online tore

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Re: TM32 conversion 75 RD350B
« Reply #11 on: March 28, 2021, 08:51:33 AM »
https://sendvid.com/39elkvrr?secret=769287c3-e80a-4b5b-97ed-a1dd87e0e312

Several test rides later moved the needle 1 clip lean. Test ride tomorrow. Before you had to be quick to get the enricheners off to avoid plug fouling. Now you have to leave them on for 30 seconds or so until the engine speed starts to slow a bit before pushing them off.
What size do you have on the choke jet?

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Tore

Suzuki T20 1969
RD350B (Indonesia) 1975
BMW R1150GS Adv 2004
HVA Roulette 1957
NV 125 1955
https://www.youtube.com/watch?v=k85mRPqvMbE

Offline tim steele

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Re: TM32 conversion 75 RD350B
« Reply #12 on: March 28, 2021, 08:52:23 PM »
I have no idea. I thought all enricheners were the same. I have a 40 pilot installed.
I Love The Smell Of Blue Marble In The Morning!!!
Tim Steele in Front Royal. VA

Offline tim steele

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Re: TM32 conversion 75 RD350B
« Reply #13 on: March 28, 2021, 08:52:50 PM »

Went up one more to 250 main jets to see if it would pull them and it pulls harder. Then when I pulled up to an intersection and put the turn signals on the engine misfired until I turned them off. I barely made it home. Battery voltage was 8.5 DC. I consulted with M in SC and told him I saw the upper alternator brush arcing while revving the engine. He said change the brushes and see if that fixes it. I went and got a brush assembly off one of my parts stators and changed it. 13.65 revving engine lights off on a fully charged battery. 14.5 to 25.5 Volts DC with headlight on high beam, brake mashed and turn signals on. :)
Last picture is 240 main jet plug chop. I am very well pleased with the results. The bike runs better than it ever has. More power and better driveability through out the range. One kick starting from cold with enricheners on. I got the carbs cheap. I am at $600 total for the carbs and all the brass plus the intakes. And I still have a spare TM32 that may end up on my Blaster..
I Love The Smell Of Blue Marble In The Morning!!!
Tim Steele in Front Royal. VA

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Re: TM32 conversion 75 RD350B
« Reply #14 on: March 28, 2021, 10:27:34 PM »
I have no idea. I thought all enricheners were the same. I have a 40 pilot installed.
The choke jet is in the float bowl. Use same screwdriver as for the pilot jet in the hole where the small pipe goes. Probably too large
Tore

Suzuki T20 1969
RD350B (Indonesia) 1975
BMW R1150GS Adv 2004
HVA Roulette 1957
NV 125 1955
https://www.youtube.com/watch?v=k85mRPqvMbE