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[C. Dolan]

Figured a picture is worth a thousand words for an intro.



Have already made some changes to get more corner clearance by setting front and rear at 35 mm sag.

That amounted to 8 turns on the rear shock, removed from bike to make job easier.

Fork springs have no pre load adjustment, so made 15 mm spacers last night to get from 50 mm to 35 mm sag.

I weigh 230 Lbs. and 62 years old.

[protomech]

The SR seems to have a pretty high take rate here..

Is this your first electric? How does it compare to gas bikes you've ridden?

[C. Dolan]

The SR seems to have a pretty high take rate here..

Is this your first electric? ............ Yep

How does it compare to gas bikes you've ridden?

Not quite as fast, but close enough to give some of the bikes on Palomar Mountain a run for their money.

The lack of engine braking takes some getting used to and puts a strain on the single disk.

Haven't noticed any brake fade.

Though I have gone easier on the brakes with this bike than I have with most,

the front disk tuned blue in about the 1st 50 miles of going up and down the mountain.

Have some Ohlins I'm going to put on from a previous bike, along with a magnesium wheel and dual disks.

Will try to get video up on You Tube by next week.

[BrianTRice@gmail.com]

"Lack of engine braking"? Just dial the custom mode to Sport settings and add a bit (50%, say?) of regen setting to the relaxed throttle mode.

[Richard230]

I just dialed up my "custom" mode (which shows up as the "eco" mode on the smartphone Zero app) today to provide 100% regen when the throttle is closed and have found that it provides a useful amount of drag when coasting down a steep road or when coming to a stop.  However, I am not sure I will keep it like that.  I am trying out different custom programming just to try out the range of adjustment available to the rider.

[C. Dolan]

Ran the SR again , last Sunday with front and rear sag set to 35 mm, dampening set about half way between S and F.

You Tube video :

Have already been doing some measurements and organizing parts.

Easiest way to upgrade rear wheel, for now, is to order a complete wire rear wheel from the dirt

bike version, lace up a Buchanan 4 1/4 " Sun Rim which will take a 160 by 60 - 17 tire.

Looks like it will still clear the belt by 1 / 8 " _  1/2 " is stock clearance with 140 rear tire.

Have Ohlins forks to do dual disk front end with Ducati Trees.

Will need to weld some brackets for head light , speedo, etc. mounts.

This will be a gradual work in progress for the next month or so.

[NoiseBoy]

I believe a 150 will fit, and is plenty big enough for the power the SR produces.  All you will do by using a wire rim is add unsprung weight.

[C. Dolan]

A 150 in the same rim wouldn't do anything.
The sides are already pretty steep on the 140.
160 with a wider rim is to get more meat on the ground.
Aluminum rim and 32 spokes wouldn't weigh much more, if at all.
Want to have more traction at full lean.
Power of the bike plus side load of cornering makes this a reasonable move.
Even more important is the dual disk front.

[NoiseBoy]

Spoked wheels are heavier, the inner tube on its own will weigh a kilo or so.

A more agressive tyre profile will give you more contact at full lean, not less.  Besides a proper tyre deforms under load anyway.

[C. Dolan]

The very edge of the OEM 140 is almost straight up and down as it is.

A 150 on the same rim would just be more unused tire.

The 160 on a 4.25 rim more usable.

The weight is of a lessor concern, but I will post a comparison weight.

Some supermoto rims have been known to run tubeless.

I'll also be looking into that.

[C. Dolan]

Spoked wheels are heavier, the inner tube on its own will weigh a kilo or so.

A more agressive tyre profile will give you more contact at full lean, not less.  Besides a proper tyre deforms under load anyway.

Update:

Spoke wheels are not always heavier.

I don't know if you ever had a rear wheel off, but it's heavier than it looks at 31 Lbs, including axle.

The wheel combo I'm going to use came in at 27 Lbs, even with a bigger tire.

The rim is capable of being run tubeless with a special sealer tape over the spoke nipples.

It will be a 4.25 " wide by 17 " Sun Rim laced to a Zero dirtbike hub and spokes that mounts directly on to an SR swingarm,

with no changes.

[C. Dolan]

After a month gone by, still can't find a 9 gauge spoke threader.

Finally , went and ordered a set of spokes made from Buchanan and went 8 Gauge.

In the meantime, got most of the front end stuff done.

The most time consuming part was making all the mounts and tabs to use OEM lights and

instruments on a complete Ohlins  front end.

Parts came from my garage stash and Ebay.

In one area, the trees fitted to bike, with tabs and fork stops fabricated .

Top clamp was 1 inch thick and flat.

ZR top clamp has 1 inch drop.

This was compensated for by welding another pair of end clamps cut from another tree.

Lower clamp re-machined to take OEM steering stem.

[C. Dolan]

On the other side of the room , a Ducati 999 s Ohlins front end set up to center and make spacers

for front wheel and check caliper and disk spacing / centering.

Big Meat rear rim waiting for spokes and 160 rear tire will be mounted.

[C. Dolan]

Skunk Werkz portion of the garage occupies about 15 % or about 1/6th of the total area.

[NoiseBoy]

Awesome! Can't wait to see the finished article.

How much range loss are you expecting from the wider stickier tyres? I imagine twin disks will introduce more friction with the extra pad contact. I can hear the pads rubbing for quite some time after a session of spirited braking in particular.