Motorcycles by Dr_C

Motorcycles by Dr_C Welcome to my technical motorcycle adventures!

This page is dedicated to motorcycles, engineering, manufacturing, roadracing and all other fun stuff related to that.

The other kids are out playing at Våler Raceway this weekend. Due to some problems with my vision (only when on race pac...
14/06/2026

The other kids are out playing at Våler Raceway this weekend. Due to some problems with my vision (only when on race pace), I sadly had to sit this one out until the doctors have figured out what is going on! 🧐 I have a trackday though, coming up on Wednesday! Then I can test the improvements done since last race weekend, in a controlled environment (no race pace). New fuel pump, new oil pressure gauge and new voltage gauge.

You do not have much time checking out the cockpit, when you are going for it, but some info is necessary in the pits or if you are facing something technical on track. Oh, yes! I'm also relocating the mounting holes in the front mud guard to make better room for the heaters!

As always: Life is racing! The rest is just waiting! 🤣

Now that's more like it! 5A at 3,5bar fuel pressure! New pump fitting Yamaha R1/R6 arrived today for 55€ incl shipping. ...
08/06/2026

Now that's more like it! 5A at 3,5bar fuel pressure! New pump fitting Yamaha R1/R6 arrived today for 55€ incl shipping. OEM was 900€ and 5 weeks delivery! 🤯

I borrowed a gas welder kit from a guy in the pits and got the exhaust muffler welded! Packed the muffler and riveted it...
02/06/2026

I borrowed a gas welder kit from a guy in the pits and got the exhaust muffler welded! Packed the muffler and riveted it back together, good as new! Found the source of a small oil leak. It was actually the pressure gauge itself that was leaking! Removed the gauge and temporarily plugged the impulse line, fixed the problem.

I took a bicycle tour around the track with Kristian Salö, who generously shared his tips and tricks getting around this heavily ondulated track!

The Sunday warm-up was wet, but now I actually recognised the turns (!). Still awfully slow, but not lost. The bike was running cold in the rain, not exceeding the EFI cold start sequence (60degC). Running rich and jerky, when rolling on throttle, is not doing you any favours in wet conditions. Still problem with my vision from time to time. The bike was otherwise running very well, with both oil and water where they should!

The start of race 2 went, and I was on it for 2-3 gears, when the engine died! No noise or seizure, just... dead. Rolled off and sighed. Packed up and drove 1000km back home again. Counted the tunnels we passed and ended at 69! Building roads in Norway can't be a cheap affair!

Back home I packed up and did some RCA. The 15A fuse for the fuel pump had blown! Checked the current while running and it was close to 13A! That's not a healthy pump, even if it is over-dimensioned! Now I'm looking for a Yamaha R6 pump, which looks like a suitable size for this engine power. It is small and efficient!

All in all, despite very poor results, the initial problems were solved, I got some track time and the opportunity to try out the challenging Sokndal track!

30/05/2026

The engine is performing well! 🎉 The first silencer, not so much. 💩 Problem with my contact lenses not staying in place, despite eye-drops, makes it hard to push on!

29/05/2026

Now going racing! Will it work?

28/05/2026

Just truck'n!

Fresh seat unit and all dressed up for race! The only time a race bike is complete! 💪😎🤣
27/05/2026

Fresh seat unit and all dressed up for race! The only time a race bike is complete! 💪😎🤣

A clear sign of season start is around the corner, is when you're cutting out a new starter number! The seat unit was re...
26/05/2026

A clear sign of season start is around the corner, is when you're cutting out a new starter number! The seat unit was repaired during winter and got painted tonight. I'm sure the MotoGP riders know exactly this pre-season drill! 🤣

Around 1000km travel to the first race. Leaving Thursday afternoon.

24/05/2026

Getting race ready!

Since there was a whole bunch of new viewers recently, I made a video introducing and welcoming you guys to my page!Plea...
17/05/2026

Since there was a whole bunch of new viewers recently, I made a video introducing and welcoming you guys to my page!

Please tell me what you think (be gentle) or ask what you would like to know more about!

If you want to support the effort send likes and cheering comments! Thats pure energy right there! Or visit my Spreadshop for some Dr_C merch! Anywho, welcome!

Here´s a summary of the Supermono I created - the DRC680

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