Modern Vespa

Chris sent me this after he shook the woodruff key out of the engine. The Thrill of Victory is apparent!

https://youtu.be/LuUImU2ZU50

hahahahahaha!

Well done Chris!!!

So here is a little update.

Chris installed a 23 tooth clutch gear in his fancy-pants Pinasco clutch. Once he found the woodruff key, and reinstalled the engine, he was getting a whirring sound, like, a whirring sound. WTF???

So he pulled the clutch and brought it over to my house (We mainly just wanted to BS, I mean, to get a lot of important stuff done).

Turns out the 23 tooth vs the 22 tooth is about 2mm larger in the width of the gear itself. And the 23 tooth setup was a tight fit. He swapped the gear back to the 22 tooth, and voila, whirring gone!

The other thing going on was he ordered a 24/24 carb - the A/F screw was bent to shit and jacked up the threads on the carb itself. David's sending out a new carb.

So we solved the whirring, and as a bonus, got B-62 back up and running with a new piston! I'm going to work on jetting the carb after I run a few heat cycles on the new rings/piston. Well, more than a few - I'm going to go nice and easy with this one, and not go larger than the 120AC when it comes to jetting. It started right up with a 120/BE4/125 main jet stack and 50/120 Idle jet, so we'll run with those to start out.


22 tooth

23 tooth

Both Pinasco - bummer they are different sizes

in order to run the 23T clutch cog, you would have to change the primary out to something like a 65.

Yeah, that's what we figured. Maybe next time the engine is opened. And then again, maybe not

Thanks Gick - appreciate the help!

Nice updates! Both you guys gettin it done. I'm glad to hear rocket is back up and breathing. Bummer about the 23t gear for Chris, but atleast you were able to track down this issue without issue

Doesn’t DRT make a 23T cog that’s compatible with a 67 primary?

Yes! In fact, that's what I have in mine. I put in a 22t, LML seven spring clutch and then replaced the 22T with a DRT 23T clutch gear, and it works fantastic. That's with a 67T primary.

Both the VNB2 and VNB5 came with the same clutch and primary 22/67. The VNB2 is a 3 speed whereas the VNB5 is a 4speed. Same gearing for the top gears - My 3rd and his 4th.

Chris went a different way with Rocket's clutch, the VNB5 - He went with a fancypants Pinasco 22T six spring clutch. I call it fancypants cause I'm actually a little jealous but don't tell Chris that!

I had to add a spacer to the clutch cover to fit the LML into the VNB2, but now I can put the 22T that came from the new clutch into the Stella, that has a 21tooth clutch gear currently...