08/7/14

2014 AFM Round 4 Race Report

After Round 3, I was able to get a lot of track riding in which ended up being both good and bad. The bad came early- a lowside while riding the new full 5 mile Thunderhill course. Both I and the bike came away with only minor damage (me bruised ribs, the bike just damaged controls) but it was enough to end my day. The good was both I and the bike were easily fixed and I was able to do 2 more days at Thunderhill (in ~110F heat!) before the AFM race weekend. All the extra riding really helped my “bike fitness” as I always find that no matter how much I work out in the off season, I can’t replicate the kind of motions while aggressively riding out on track.

I did the Friday trackday of the race weekend I had two goals:

  1. Work on bike setup
  2. Test a brand new prototype front brake lever for Constructors Racing Group (CRG).

Continue reading

06/10/14

2014 AFM Round 3 Race Report

After missing the last three rounds (my engine leaking oil from the cases at Round 7 last year, an electrical issue for round 1 and an injury sidelining me for round 2), I was desperate to finally get back out on track. I literally hadn’t been on a motorcycle since October of last year and I felt like a heroin addict in withdrawal. There was of course the small issue of a severed tendon in my left middle finger which had me sidelined last round. I remember having the following conversation with my physical therapist just a few days days before round 3:

Me: So when do you think I can start moving my finger and start racing? I have a race in little over a week.
PT: Racing? Like a marathon? Oh, no you can’t do that, far too dangerous! You might trip and fall and hurt your finger!
Me: Actually I was talking about bike racing.
PT: Oh, no, that’s far worse… people crash in bicycle racing all the time and you might re-injure your finger!
Me: Uhm… not bicycle racing, motorcycle racing…

At this point I got that look motorcycle racers have been getting from “normal” people since the beginning of time. You know the one- it’s where you suddenly you feel the need to touch your shoulder just to make sure that you don’t have a second head growing out of it. Clearly I wasn’t going to the answer I was looking from the physical therapist! She did however say that the final decision on these matters would be up to my doctor: Dr. Ting.

As luck would have it, I had a follow up with Dr. Ting on Tuesday the 27th and he cleared me to start moving the finger for the first time in 7 weeks and said it was OK to ride if I wrapped my finger to help support it. Two days later I had the truck loaded up and I was driving up to Thunderhill Raceway! Continue reading

05/21/14

SV650 ECU Decoder v4.6 Design Finished

So I just ordered a few new boards from OshPark:

Front

Back

This was a major update which fixes all know bugs (many which are severe) and improves the protection of the circuit.

  • Switch to Murata 5V switching regulator.
  • LM7805 was overheating with heavy use of LED display in latest code
  • Add power MOSFET for reverse polarity protection
  • Add TVS diode for power/spike protection
  • Fix fuel/very low fuel indicator for 03-04 and 05+
  • Move EFI light off of pin 11 to allow interrupts to work
  • Move Mode switch to an interrupt pin
  • Add ground plane & clean up traces
  • Further improve battery voltage monitoring
  • Capacitors are now SMD too