TheSamba.com :: View topic - 6 to 12 v convert, grinding, and dual/single port questions

Sat Jun 26, 2004 6:38 pm

Heres the deal, I am looking at an inexpensive motor tomorrow for my bus. It is a 1600 single port motor.
I currently have a 1200 motor in it that is 6 volt and I will have to convert it to 12 volt if I put in this new engine.
I have been told that I need to grind the bellhousing to accomadate the 6v flywheel. is this complicated? please explain. also will this cheap tool do the trick? http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=3150 probably a single time use tool.
I am also wondering if if there is that much power difference with a dual port rather than a single port motor? I am definatly on a budget but scared I may be wasting dough on a motor that wont be enough of a power differance from my 1200.
Advice please!
Thanks in advance,
Dan

Sat Jun 26, 2004 8:01 pm

Just go to home depot and get a dremel and attachments. there's a die grinder bit that works great. Get some saftey glasses as the aluminium will eat your eyes out. Try to cut out a cardboard template using your 12v flywheel as a pattern. be patient in your work. there are only a few points that need to be opened up. also replace your trans. outputshaft seal, and don't forget the 12v starter bushing.

Sat Jun 26, 2004 10:00 pm

Yes... the grinder will work and you can use it for a lot of other things later. :)
What I do when I clearance a transmission from a 6V to a 12V flywheel is
I install the 12 Volt clutch with disk and flywheel (as an assembly) on the input shaft and clearance what ever it hits.
Wear EYE protection. :shock:

Sat Jun 26, 2004 10:47 pm

Never done this b4, are you saying I can install the clutch and flywheel and basicly trace with a sharpie where it will hit? The engine should come with the clutch right....anyone know of a link with pics for this opperation?

Sun Jun 27, 2004 11:18 am

Start with the flywheel and then set the clutch disk in then bolt up the clutch(make sure it is centered in the flywheel)
You will then be able to put it on the input shaft and see what it hits in the bell housing...the ring gear will even clearance it some if you rotate the flywheel on the input shaft.
As you are grinding and checking the fit (use a light spritz of spray paint) to cover the fresh marks so you know when to say enough.
Also have the throw out bearing installed so you know how deep to clearance.
The material comes off fast with a grinder so take your time and leave as much as you can.

Mon Jun 28, 2004 5:59 pm

Thanks,
Will I also need a 6 to 12 volt adaptor bushing? Or is this just if I am puting the 12v flywheel on a 6v engine? I am reaading about it but its a bit confusing

Mon Jun 28, 2004 9:26 pm

You WILL need a 6v to 12v starter bushing AND a 12v starter. You will need a 12v flywheel (200mm) and pressure plate.

You MUST get the 200mm EARLY pressure plate as it has the correct colar on the fingers (big washer looking thing) to match with the EARLY style TO bearing. You may be able to use the one that comes with it if it has a washer looking thing instead of exposed finger tips.

BUT!

While the engine is out why not have the flyweel turned and replace the consumables...Clutch, P-plate and TO bearing so you don't have to replace them after the lead foot wow this is much faster than a 1200 syndrome settles down :)

I have found it easier to just get a 1967 autostick starter as it is 12v, high torque and does not require the bushing if you have to buy a starter anyway.

You WILL need the bushing if you go with a standard type starter. If you go with the bushing do yourself a favor and test fit the starter before you stick the engine back in...they bend easy and may not let the pilot fit correctly.

Grind SLOW...you can always take out more...tough to put it back :)