[Shovel_Dan78]

Ok, from what I have learned about numbers (thanks to the helpful posts here on the JJ), I have a 1978 kick motor that had an electric start added, along with the 60620-74 inner primary, and a '66-69 ratchet top 4spd trans. Since my (brand unknown) belt drive pulleys and clutch hub assembly are shot, I am thinking of either getting the BDL EVB-3T-4 belt drive kit, or maybe reverting back to the chain.
For the BDL guys, does the kit really come with all the pieces to easily bolt in? And, specifically, does the clutch hub that comes with the kit actually fit the trans shaft taper?
I want to keep the enclosed primary look because I dig it, so 3" open belts won't do 😅. Thanks, as always, for your advice!

 

[Shovel_Dan78]

That is what I am a little curious about. When I used a puller to get the clutch hub off of the taper, when I had it snugged up, it only took like an eighth turn before the hub popped off easily. Didn't seem like it was on very snug at all! So now I'm wondering if I have a short shaft or if (likely) the mechanic just didn't tighten things right.

 

[Shovel_Dan78]

One more quick question. I see nine springs for the clutch plate, but there are twelve holes in the plate? Are three of the holes just not used? Sorry for the dumb question, but I want to learn as much as I can before I drop that kind of dough on something 🤔

 

[Shovel_Dan78]

Thank you for the info and links, gives me stuff to think about ☺

 

[Shovel_Dan78]

Also, while you may have a case from a 66-69 transmission, the main shaft has certainly been replaced with a long one to work with the longer sprocket shaft on the engine (made necessary by the addition of the alternator in 1970).

Is there a way to verify without taking the trans apart? I found info on OAL of the various mainshafts, but didn't see any giving a measurement from, say, the mainshaft seal, etc. Here are some measurements I took with the inner primary on. Any thoughts would be appreciated 🙂

Also, there wasn't any oil seal in the inner primary, there was only the bearing, which seemed a bit weird to me?

 

[Shovel_Dan78]

Here are some pics of what I've got, hope they might help. Here is a back shot of the clutch basket with the hub going into it. The hub has the roller bearing cage between it and the basket. Also, a pic of the tranny and engine cases, and the '74+ inner primary with the sealed roller. Heading over to the Andrews site now 👍

 

[Shovel_Dan78]

Thanks, guys, for the awesome info! I appreciate all your help in figuring what pieces I have mashed together. One of the reasons I love this bike so much, it's a lot like my old hot rods 😁. Different pieces lend their own soul!
Dutch: Good eye! Thanks, that was going to be my next question, I thought it looked funky!
Hoges: yup, that's the hub I've got (but in much worse shape, lol), thanks for your thoughts on the mainshaft.