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  1. Philip

    Owner's Review The Torpedo bat of Dirt Bikes, first impressions.

    I used to complain about the on/off throttle. I think Stark Future has been reading because I too noticed that my Stark is now loading into my trailer just as smoothly as my Alta does! Also, I no longer have to shift to the 35 hp setting for flat dusty or gravely turns. Keeping the bike in the...
  2. Philip

    Bonnell 40hp and 60hp dirt bikes and e-bikes

    New segments is where the fast growth it. In the established segments you have to displace established companies, so any new product has to be either a lot better or a lot cheaper. In new segments you just have to have a product.
  3. Philip

    Want to buy Factory Alta left hand rear brake kit

    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...
  4. Philip

    Bonnell 40hp and 60hp dirt bikes and e-bikes

    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.
  5. Philip

    Melted UK charger plug

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

    Bonnell 40hp and 60hp dirt bikes and e-bikes

    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!
  7. Philip

    Solid Pink or is it Magenta?

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

    Stark Varg: Gearing for optimal range

    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
  9. Philip

    Stark Varg: Gearing for optimal range

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

    Stark Varg: Gearing for optimal range

    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?
  11. Philip

    Arctic Leopard E-XE 880 Electric Dirt Bike

    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...
  12. Philip

    Post Your ***STOCK*** Stark Varg Suspension Clicker Settings!

    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...
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