92mph? My new Project, Racing mower! Craftsman / Jonsered LT12

Finally some progress
I got the Engine and Jackshaft mount cut today.





Jackshaft mount.


Will try to weld it tommorrow.

Jackshaft and Comet CVT explained in the video.




I think I need a script next video  Always struggle to find the correct word

Got it tack welded today, so far so good.





Also had to grind the inside of the frame where the Comet Driven Unit will rotate.





Tadaaaa!
Bolted down

In your latest video-did you say you were making a bottom plate for this? or is that 5mm top plate the only thing?

redlinemotorsportts wrote:

In your latest video-did you say you were making a bottom plate for this? or is that 5mm top plate the only thing?

Yea there will be one thicker on the bottom.

Its looking really good Thunder! Really professional looking work, nice and clean.

Thank you Doug!

Yeah Thunder... absolutely beautiful and well thought out. Excellent engineering for sure. Maybe you can answer just one question for me about it... how heavy do you think it'll be when done? Really curious about that aspect...

Thank you! And not really any heavier than another stock one. But not sure yet.

The 820 peerless is pretty heavy.
The Briggs Opposed is pretty heavy.
The Jackshaft / CVT pretty heavy.
And the front suspension system will also be pretty heavy.

The frame and mount might look heavy but its not.

But there should be no slippage when done so will be fun to see how heavy it will be.

I thank you for answering. It just dawned on me so I asked, and with all the metal work being added it just seemed it would be rather stout once fully assembled. Difference in preference perhaps but I would not want to have it gain weight... but lose it.

No problem and yeah I want it light and fast aswell. But remember this is the prototype so to speak. It will be easy if it works as planned to produce another one and make it lighter and tweak it.

Jackshaft welded up today, will paint it now.

Got the 4" brakedrum from bmikarts, it fitted over the 820 like i planned. This is to get the brake disc fitted.




Also ebayed this Genuine Briggs Opposed muffler ( not that im gonna use it on the final build ).
I did some rust threatment on it.

Before


After


Btw its not painted yet.
And I mainly got it for the header adaptors.

Also bolted the engine on the frame for the first time and loosely mocked up the jackshaft and CVT, My clearing on the driven and frame is zilch, nada, zero I wonder how the belt will act to that?







Also got chain tensioners that i will modify from BMIKarts.


Changed the jackshaft color to silver hammerite

beautiful work as usual thunder, ready to see this thing get a body lol

richie thomas wrote:

beautiful work as usual thunder, ready to see this thing get a body lol

Not yet lol

Used start gas, but dont try it at home

Stretching tires is hard, even with a filler ring. Tubes makes it easier though.

I really do like the chain setup to the transaxle. But I wonder if you can switch that chain and put a pulley on the jackshaft and transaxle and it would still work right?

Marines2621 wrote:

I really do like the chain setup to the transaxle. But I wonder if you can switch that chain and put a pulley on the jackshaft and transaxle and it would still work right?

Sure, but why add slippage

And I re-designed the Steering wheel axle rear support and made the bottom 820 Peerless mount hollow, to save weight.

More parts cut, nice to see what was Just a CAD drawing. Cut in solid steel.

Steereing wheel bearing support and lower jackshaft and axle mount.














Bottom Jackshaft bearing support plate

That waterjet! GIMMIE GIMMIE IT!!!!!

redlinemotorsportts wrote:

That waterjet! GIMMIE GIMMIE IT!!!!!

no i want it

Welding the rear ready,





Bottom Jackshaft mount bolted up,


Front gearbox mount, I re-used the original ones just cut and bent to form 90 degree mounts.










Peerless 820 mount all done! (sort of),

My Briggs Opposed Twin First Start Up I Swear  No I Really mean it! 
Briggs running wohooo

why is it blue at about 2mins