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

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

motorizedeverything wrote:

why is it blue at about 2mins

Cause I put the phone down, to be able to rev the engine.

Sure wasnt easy to get the jackshaft to run straight in that tiny spot. Maybe the Driven Unit isnt straight from the factory cause ive read many stories about many being warped. Tho I just think I need to weld in some jackshaft mount guides, something the jackshaft mount can rest against in the default mounting holes.

Briggs Opposed Twin @ Idle with Dual Pipes, Noisy



I also got new short shifter rod and fork and the short input axle for the Peerless 820, this so I can get the seat another inch lower. (recorded it upside down lol oh well, also I called the part number the "pin number" lol oh well)... 

If I may ask, why is it idling so high?

prometheusEDI wrote:

If I may ask, why is it idling so high?

I dont know, hope'd you could tell me. Its all the way down there both choke and throttle. Might be the leaky intake tho. Tho I think its my governed setting. I havent studied it much yet. Just got it running, remember.

Btw you can see when i throttle up the clutch engages. And it does engage at 1700rpm so its not that high, maybe 2-300rpm to high. Tho I've read these should not idle below 1200rpm since its splash lubed.

Het Thunder Divine change your Idle adjustment screw on the carb a bit you can get 1000-1200 RPM by adjusting it

Ariens YT11 wrote:

Het Thunder Divine change your Idle adjustment screw on the carb a bit you can get 1000-1200 RPM by adjusting it

No already tried that, think it must be on the governor. Or my gasoline is maybe to spicey

yes, I suppose you have a point. Still, Ive never seen an opposed twin idle that high. You mention the leaky intake, I would look there to solve that problem. Otherwise, if it works for you, then it works for you.

prometheusEDI wrote:

yes, I suppose you have a point. Still, Ive never seen an opposed twin idle that high. You mention the leaky intake, I would look there to solve that problem. Otherwise, if it works for you, then it works for you.

Its not leaky as such, and ive seen loads on you tube.
Whats the idle at if you should guess? My guess is max 1500rpm

I got the repair manual, will do a read up on idle speeds since these have many idle settings.

But dont get fooled by the "Look how low mine can go" vids cause they wont get good cooling if below 1000-1200rpm.

Also remeber we have 98 octane gasoline in the pumps, thats racing fuel to you guys so it might just even be a run-in thing.

Anywho i got far more serious things to sort out than a high idle setting

Thunderdivine wrote:

prometheusEDI wrote:

yes, I suppose you have a point. Still, Ive never seen an opposed twin idle that high. You mention the leaky intake, I would look there to solve that problem. Otherwise, if it works for you, then it works for you.

Its not leaky as such, and ive seen loads on you tube.
Whats the idle at if you should guess? My guess is max 1500rpm

I got the repair manual, will do a read up on idle speeds since these have many idle settings.

But dont get fooled by the "Look how low mine can go" vids cause they wont get good cooling if below 1000-1200rpm.

Also remeber we have 98 octane gasoline in the pumps, thats racing fuel to you guys so it might just even be a run-in thing.

Anywho i got far more serious things to sort out than a high idle setting

Quite familiar with proper idle adjustments with the opposed twins... I ran them most often at an even 1000 rpm.