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Discussion Starter · #1 ·
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 馃槄. Thanks, as always, for your advice!
 

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ALL shovels were originally electric start. Kick only wasn't even an option from the factory after 1964 as far as I know.

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).
 

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Discussion Starter · #4 ·
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.
 

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Discussion Starter · #5 ·
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 馃
 

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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 馃
The clutch hub, if PROPERLY installed and torqued, really shouldn't take any extreme force to remove. It is relatively normal to have to use a lot of torque, and even tap the hub with a hammer, to get it to come loose, but that is because it is relatively normal for people to install them with impact guns and actually OVER torque them. On the springs, yes, BDL has 3 extra holes in the pressure plate that aren't used for springs. I suppose this gives one the option to install extra springs if they are making enough power from the motor to require more force on the clutch. I've never seen a street motor that made that much power though. One other thing, I'll second the recommendation on Rivera Primo parts over BDL as far as quality and reliability are concerned. Here are a couple of links to a belt drive and clutch that will work with your set up.

B2X 11mm Belt Drive Kits

 

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ALL shovels were originally electric start. Kick only wasn't even an option from the factory after 1964 as far as I know.
FX were kick start only. Early Fx primary were not even machined for electric start. FXE were electric start. 1979 was the last year to buy a kickstart only FX. KIckstart was used till 1985 with electric start on 4 speed models.
 

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Discussion Starter · #10 ·
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 馃檪

Handwriting Rectangle Wood Font Parallel

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

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The 65/69 inner primary did not have a seal the sealed bearing is the seal. Go to Andrews site and it shows the 4 main shafts sizes. Also i fitted a BDL 3" electric start kit to a 74 trany . The Clutch hub is Alloy and cracked at the key way very thin there. Found out Zippers and others make a ring to press on to stop this.
 

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Discussion Starter · #14 ·
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 馃憤
Automotive tire Gear Rim Bicycle part Wood

Automotive tire Motor vehicle Crankset Automotive design Bicycle part
 

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The 65/69 inner primary did not have a seal the sealed bearing is the seal. Go to Andrews site and it shows the 4 main shafts sizes. Also i fitted a BDL 3" electric start kit to a 74 trany . The Clutch hub is Alloy and cracked at the key way very thin there. Found out Zippers and others make a ring to press on to stop this.
Early versions like mine had a steel hub , these won鈥檛 crack .
But this development shows BDL prefer dollars over quality and in the end it is the users problem , combined with some design flaws in the basket you should just stay away from them. To me It looks like shovel-dan runs a oem belt set up now. In any way a primo would be an upgrade 鈥.chain or belt is another discussion.

(And your seal at the motor sprocket shaft is mounted in the wrong direction)
 

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try KARATA belt drives, they ARE still in business but i believe downsizing, but contactable still,
i spoke to them about 2 weeks ago about getting a new spare belt for mine on their FACEBOOK page,...
the quality of their kit is great, & from what i have seen better quality than most makes out there for sure
 

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The primo kit posted above says 65/84 electric start but on a 65/69 the ring gear is positioned on the clutch shell further out. So a 70 on wont work unless you machine clutch shell View attachment 274794
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 馃憤 View attachment 274795
View attachment 274796
You have a stock clutch hub. And a 70 up main shaft from what i see. The bearing would be the double row cage type.
 

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Discussion Starter · #19 ·
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 馃榿. 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.
 
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