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I've had a '71 Suzuki TS125 tucked away in my Dad's barn for 25 years and I've decided to pull it out and resurrect it next year. Can anyone recommend any good vendors? Also any decent mods to improve on anything?

Going with Economy. They are my favorite vendor to deal with always. Always working to keep customers happy! Thanks for the input everyone!!!!

I was leaning toward Economy this whole time as they have always been good to me. Mark, the bolt kit is another $12, but better than the $24 that HVC charges. HVC is cheaper than Economy on the ignition though and I've found them a little cheaper yet on eBay.

Looking at installing a Vape in my RD350. Any reason to stick to a certain vendor over another when purchasing or do I get the same instructions, support, etc no matter where it's purchased?

Thanks!

Done! So sorry this is something you have to deal with.

I'm that guy in my neighborhood as well.  Seem to get a lot of attention.

The laws here allow motorized bicycles, although they have to have pedals and lights that operate off of the engine's charging system. No way I'll try to run lights off of this and don't think the police will be worried about how they are powered.

This thing is shelved until winter. Remodeling is constant and now that my wife's father is in a nursing home most of our time is dedicated to caring for his home and acreage.

Thanks Mark! Not using my resources properly lately....

Looks good! Where can a guy find the wiring info?

if you have original wheels, there is a date code either cast in on mags or stamped in on spokes. usually a month after that date is the bikes build date.

Did not know that. It's pretty obvious I have a US spec 74 RD350 due to the color and some engine clues, plus it is titled as such. No plans of restoring, but would be nice to have this on the frame.

Is there a way to determine the date of manufacture based on the vin? My RD doesn't have the decal.

I have the same problem on my 74 RD350. LED stop/tail/turn and it's flashing or on all the time. I have an LED flasher for the turn signals which works great. I'm sure a resistor might fix the brake light, or just remove the bulb 

Thanks all for the recommendations! I like the link with diagnosis information.

Also like the recommendation to replace regulator/rectifier with a new/modern option. This stuff is obviously original and I am never against "cheap insurance" by replacing old stuff.

Economy has a replacement I will buy, and will try to source new brushes for the charging system as well. The negative brush is just barely above the minimum 6mm.

If I get some time this weekend I will be doing some of the electrical tears that I haven't performed.

I have a Haynes which seems like it's not specific and also recommends having an "expert" evaluate the rectifier and other components.

I don't understand how I'm supposed to check the voltage regulator without the batter in to start the engine as stated in the attached photo.

Checked voltage at the brushes @3000 and had 2.8 volts.

Almost two weeks ago I was riding my RD350 home from work when it starting running rough and backfiring. Had to rev the piss out of it to keep running as it wouldn't idle. Glad I made it home.
When home I noticed the left side exhaust was cold as the engine was backfiring.

Finally looked into it today. I have Dyna S ignition and thought maybe a screw vibrated loose and timing was bouncing all over on the left cylinder. Pulled the cover and discovered that's not the case. Tried starting after and would only "half" fire. Checked battery voltage and was just above 8 volts. Charged the battery and it fired up and ran great. Noticed my headlamp bulb is fried though. Battery voltage when fires was 12.83 volts and continued to drop to around 12.3 volts even while revved to 2500-3000 (with and without lights on).

Where do I start diagnosing this issue? How do I correctly verify it is charging properly? I know I've successfully checked the charging system prior to installing the Dyna IGN, but manuals I have in hand are not very helpful at the moment.

Thanks all