Needed SL70 engine

Looking for an complete engine or at least a short block. Does not need to run but must turn over
 

69ST

Well-Known Member
What, specifically, are you after...at the minimum? I ask because the 4-speed/6v lower ends are all the same, except for the serial numbers (duh), the CT70 shift pattern, and the CL70 alternator. The CT70H version is the most plentiful. The 4-speed alternators physically interchange, you just need the 4-speed crank to fit a 4-speed flywheel. IOW, unless you need an SL70 LH case half, for the SN, you could piece-together an SL motor and that might make your task easier than sourcing an actual SL70 lump...which is a fairly rare piece these days.
 
What, specifically, are you after...at the minimum? I ask because the 4-speed/6v lower ends are all the same, except for the serial numbers (duh), the CT70 shift pattern, and the CL70 alternator. The CT70H version is the most plentiful. The 4-speed alternators physically interchange, you just need the 4-speed crank to fit a 4-speed flywheel. IOW, unless you need an SL70 LH case half, for the SN, you could piece-together an SL motor and that might make your task easier than sourcing an actual SL70 lump...which is a fairly rare piece these days.
Was actually looking for a sl70e vin. But did want to keep sl shift pattern. I have an "H" motor tore apart. But it has a junk mitibushi assy. and needs head, cyl.
 

69ST

Well-Known Member
Yeah, that may take some patience. But, you never know when a LH case half with an SL70 sn will pop-up...you only need one. Same applies to the head, except an SL70 head casting is going to be tougher to ID, unless you know the casting numbers.

4-speed alternators do come up, though they bring some bucks these days. An "xrarespares" CDI conversion might be good solution...unless this is a hardcore purist restoration. That kit allows retention of the outwardly stock appearance...also allows the choice of a 3-speed or 4-speed crank. 3-speed cranks & alternators are the same for every 6V Z50 & CT70 3-speed and K1-earlier specimens are cheap & plentiful.

AFAIK, the 1D/3U shift drum can still be sourced as NOS.
 

kirrbby

Well-Known Member
I did have a SL engine, but I sold it recently, and I don't think I have another. There are SL cases FS on eBay tho for 50 bucks shipped...3 or 4, or more.
The mitsu setup is most likely repairable...how bad is it?
Imo, you might do well to sell off the H parts, and wait for a SL engine...good core, to start with.
 
Yeah, that may take some patience. But, you never know when a LH case half with an SL70 sn will pop-up...you only need one. Same applies to the head, except an SL70 head casting is going to be tougher to ID, unless you know the casting numbers.

4-speed alternators do come up, though they bring some bucks these days. An "xrarespares" CDI conversion might be good solution...unless this is a hardcore purist restoration. That kit allows retention of the outwardly stock appearance...also allows the choice of a 3-speed or 4-speed crank. 3-speed cranks & alternators are the same for every 6V Z50 & CT70 3-speed and K1-earlier specimens are cheap & plentiful.

AFAIK, the 1D/3U shift drum can still be sourced as NOS.
Thanks for all the great information. Can the H motor be converted to a 1 down 3 up with a new shift drum? It does not have to be a pure motorcycle. But I did want an sl vin number. Also thank you for the CDI information
 
I did have a SL engine, but I sold it recently, and I don't think I have another. There are SL cases FS on eBay tho for 50 bucks shipped...3 or 4, or more.
The mitsu setup is most likely repairable...how bad is it?
Imo, you might do well to sell off the H parts, and wait for a SL engine...good core, to start with.
L thank you for the reply and the good information
 
Somebody posted on my question last night from Arizona. But I have seem to lost that information. The gentleman said he had a engine. Please respond again if you can thank you
 

69ST

Well-Known Member
You can find the CT70 part numbers here. SL70 parts here.

AFAIK, it's just a matter of swapping the shift drum. What I've not done...in years...is cross-check all the part numbers. If the gears are all the same PNs, as I recall, they are consider that hard verification. Check the shift star PN, too; it should be the same...if not, it's an inexpensive item.

Here's a really convenient source of info and some parts

FYI, there's also the possibility of using an AHP 4-speed tranny. That has the 1D/3U shift pattern and can be sourced through Tbolt, hondarailbikes, etc (I believe dratv sells it, too).
 

kirrbby

Well-Known Member
You should post the first 4 or 5 digits on your frame's vin number. Maybe we could find you a close match. Im pretty sure you CAN convert your H to 1d3up by just swapping the shift drum and star. The H and SL engine cases have different vents, but I think they're the same otherwise.

Did the Arizona member send you a private message? You should be able to find that by clicking on the envelope, top right of the page.
 

Z50nut

Active Member
It appears you have a few leads, but if helpful, I have an XL70, 4speed manual engine that I'm willing to part with. I believe the XL70 is virtually identical the SL70 with an up pattern. Cosmetic condition of engine is rough, and I'd assume the same for internals. PM me if interested.
 
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