Original Minarelli Vertical Crankshaft

[86jog]

Hey Minarelli Performance People!

I have a question relating to older minarelli motors, and crankshafts.

This is my first actual post on this forum other than an introduction. 

I have a 1986 Yamaha Jog CE50T-R which has the older (first?) version of the Minarelli Vertical 2 Stroke motor. I wanted to run a polini corsa cylinder, Yasuni R pipe, Polini 4race crank, and Malossi over range variatior kit. I called ScooterSwapShop asking if that setup would work, but they said the crank would not fit. I know I need an upgraded crank to run a Corsa cylinder, but I cannot find a crank that says it would fit. They said the cylinder would fit though. Still unsure about the over range, but that would be a topic for another thread.

My question is: Are there any upgraded crankshafts that will fit my version of the minarelli vertical and can hold up to a Polini Corsa? 

My other option would be to find a zuma or 89-01 minarelli clone for cheap to steal the motor out of, which they said would fit, but I would much prefer to find a crank that works...


Thanks in advance, and happy scootering!
-86JOG

[aeroxbud]

Stage 6 do a HPC MK II crank which is good for 16,000 RPM. Part number S6-8016805

[Lucass2T]

Sept 26, 2022 22:47:53 GMT -5 86jog said:

My question is: Are there any upgraded crankshafts that will fit my version of the minarelli vertical and can hold up to a Polini Corsa? 

Tons of choices:
www.racing-planet.com/xanario_search.php?query=Minarelli+vertical&attrib%5Bcomp%5D%5B0%5D=Crankshaft

Top racing is great quality for a good price. Manufactured at the Jasil plant.
allesvoorscooters.nl/krukas-top-racing-hq-high-quality-voor-minarelli-verticaal/

Rito is in the same category.
www.m2trading.com/nl/webshop/motor/krukassen/krukas-minarelli-vertikaal-rito

Same for Top Performances. TP is apparently a subsidary of Minarelli Motors in Italy.
www.bromfietsshop.nl/top-performance-krukas-minarelli-verticaal.html

Doppler is OK-ish. Had the 10 pin version, the bearing blew up on me on day wrecking the head and piston. Not my no1 choice. 
www.k-parts.nl/krukas-doppler-origin-minarelli-verticaal-pen-10.html

Airsal Pro-R. Airsal makes great budget cylinders. Not familiar with their cranks.
josdijkman.nl/krukas-airsal-pro-r-minarelli-verticaal.html

MVT, not familiar with these products. Looks like a rebranded Airsal Pro-R crank
www.scooterdiscounter.nl/mvt-krukas-minarelli-verticaal.html

[geoffh]

I,m not sure about this but I feel the need, birdman had a CG or CE jog with "tuned engine" but said it was held back by the gearing which he had not been able to upgrade,hope I,m wrong but worth considering before you invest in a crank and kit.

Geoff,

[Lucass2T]

For minarelli vertical motors there are gear sets available. And they aren't hard to find...here in holland at least. A quick 5mn google search yielded this:

www.vandenburgeindhoven.nl/onderdelen-accessoires/motordelen/carters-kickstarter/transmissie/secundaire-vertanding-minarelli-vertikaal-horizontaal-polini

www.bol.com/nl/nl/p/andwiel-overbrenging-secondair-14-41-met-rechte-vertanding-polini-aprilia-amico-gl-sr-viper-urban-replica-yamaha-bw-bw-ng-bw-bump-spy-slider/9300000026434812/

www.bol.com/nl/nl/p/tandwiel-overbrenging-malossi-primair-16-40-met-rechte-vertanding-aprilia-amico-gl-sr-yamaha-bw-bw-ng-bw-bump-spy-slider/9300000026472872/

www.m2trading.com/nl/merken/aprilia/amico-50-1994-minarelli-verticaal-a-c/vertandingen

[86jog]

That is good information about the gear sets. 

I called a scooter shop just now and they said that a Zuma crank will fit, but the variator side would have difficulty. They recommended using a horizontal jog cvt kit because it had the correct belt length. They said stuff would bolt on but that it would take a bit of ingenuity. They made sure to mention that what I would be doing is kinda rare and that they can not guarantee part fitment because they haven't done it before. Basically they said I could run any Zuma crank and CVT kit (read: malossi over range;)) but that I would need all the parts out of a Zuma transmission to make it all fit together. They were excited about the project and wished me luck but said it would likely be easier to bolt a Zuma motor in it instead...

Now I guess I could run a Zuma crank but then I would be dealing with the transmission. It looks like I'll tear the motor and transmission apart and then see what happens...

Anybody got advice about Zuma transmission parts in a CE50 JOG?

Happy Scootering!
-86JOG

[geoffh]

Right I have found the info from from birdman that led me down the gearing pathway,it,s good news I think,on page one of my grandad jog build birdman says 53mph with bbk and pipe,but he needed taller gears and could not find them,53mph on a little jog is well fast enough for me,birdman is USA based so the parts are available to you.

Geoff

[aprilialenni38]

It’s not an easy part finding a krank, for that Old full auto horse. My best bet from googling 2 minutts, is a crank from Yamaha BWS Ng/spy, Yamaha cw50, Yamaha booster. Thouse 4, har 2 difrent types, but basicly same shit. The Bouth of dem, is packing a vertical mineralli, and is the only vertical minarelli. But it’s just some good iders, i have absoulutly 0 knowlige of yamahas before 1985. A Nice fun projekt, if These engine, dosnt match youres. Buy a used more modern vertical mineralli, or a horizontol if you prefer that. The swap shoudnt be a Big deal, and opens up more Doors, for tuning.


Btw the Overrange variator is wired choice(without bigger pulley) and wont offer more, than a polini speedcobtroll. I would also highly recomment a new, same size as standart pulley, that rices straight(like stylepro, top performence, and more). I would 100% recomend to replace The pully for another that has a straight rise.

[randyboebandee]

Did you ever get this figured out? We're you able to use the zuma crankshaft? Also if you did would you be interested in selling your stock jog crank?