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We used clutch master cylinders on the Alta. Now Stark has Brembo master cylinders with larger fluid reservoirs, which work better for brake application because they are less likely to become low on fluid and suck in air. But... does anyone know the Stark Brembo LHRB master cylinder piston...

Yeah, having a no-name reduced diameter and reduced travel suspension, despite having swappable racing batteries, will relegate these bikes to non-jumping, woods riding, and a few amateur competitive events. This is a very unfortunate product decision.

Thanks for the heads up. Filing this under its own special category: https://electricdirtriders.com/forums/the-fugly-charger.113/

These are the new Bonnell 40hp and 60hp dirt bikes. Here are the Electric dirt bikes: They also have 1200W mountain bikes that have throttles. These are electric mountain bikes: Thanks to @DonCox for the news!

Don't let any non-Stark owner see the title of this thread!

I see your point, you are right. I asked Grok again and the answer came out better tailored but still similar to what it said before. Its efficiency likely peaks (e.g., 94-96%) at a mid-range RPM (perhaps 5,000–7,000 RPM). https://grok.com/share/bGVnYWN5_51db0bfb-2da9-41d5-bda3-5920f132f68e

You have to run a computer simulation then! :-)

The "sweet spot" for PMSRMs, often occurs at a mid-range RPM (e.g., 3,000–6,000 RPM for automotive applications. https://grok.com/share/bGVnYWN5_9857d3c6-b356-4851-84f9-0b97f0b9cfbb This is 30-60 km/h for the Stark Varg. What is the average speed in your race?

Yeah, I saw that storage compartment on the Leopard. it's at the end of your video. The Alta has a huge empty space around the rear shock. But you'd need to design a special bag to fit there to use that space. The Stark has almost no empty space! Maybe someone could fit a cupholder somewhere...

Here are the updated settings. Note the all-important 5-lb reduction in rider's weight! :-D Rider Weight Skill Level Primary Riding Philip 190 w/o gear, 220 with gear Intermediate Motocross FRONT Suspension Factory Default for 90/95 kg Philip's Settings (by Casey Casper) Delta...

I tried 1 click harder in the front and 1 click softer than before in the back, and the bike felt choppered out and had too little front traction in hardpack flat turns. So, I put the front back to where it was. I feel my bike is nicely balanced right now. I already went 1 click softer in the...

I remember there was a YouTube video on exactly this. Maybe you could use the Stark phone as a wireless hotspot, keep it plugged into a wall so that it doesn't die, set up a smart plug, plug the charger into that, and then turn on that smart plug from your other phone. I think the YouTube...

Have you ever tried riding a motocross track and watching your digital speedometer at the same time? I will never be able to do this when attacking a turn or when accelerating for a big jump. If we eventually get data logging, this will all be possible. But right now we might have to install...

I could use one with a 2mm smaller offset for more stability.

Thanks for this tip. I played with this blue rear hi-speed compression clicker today. Clicked it two clicks back out, back to stock, the bike started riding softer, like a big sofa. It was more relaxing, but it was slower, I didn't like it. However... one thing that I had been struggling with...

Matt Burkeen: Like a stroller on an escalator

In order to charge from a van or a generator, you usually need to "bond your neutral to ground", which means just adding a tiny thin jumper wire between the Ground on your 110V plug and the Neutral pin. Be careful not to connect it to Hot.

Back in the day, when we raced ICE bikes on ice back in Russia in the 80's, we would install longer throttles just for the winter. A shorter throttle than the stock Stark's won't help you pop a wheelie if you are in the 40-hp mode. You need more HP/torque. But maybe you can ride in the 80-hp...

I wish Stark had shown the Torque plot instead or in addition to the HP plot. The HP plot is confusing and lacks resolution at low RPM.

This would feel like you are in the 80 hp mode until 4K or 5K RPM, which is way too fast, probably 40 - 50 km/h. You should try maximizing only the low-rpm power, the very first 1K RPM point.