Slovakia Ring test

June 2014

Viewing posts from June , 2014

Slovakia Ring test

After the mammoth journey to the Slovakia Ring, which was made even longer by my buddy’s underpowered Dacia towing a big box trailer with 3 bikes in it, we were ready to hit the track. To say I was nervous, is a massive understatement.. my biggest concern was the fuel tank I had made. Partly because it’s the first fuel tank I’d EVER made, and partly because of the paltry 10mm clearance I’d allowed between the rear cylinder head and the tank… What if I ended up turning into a fireball halfway down the straight..?

Still, in the spirit of “he who dares wins” I headed out for a gentle first session. After about 3 laps it became apparent that all was in fact utterly splendid, and with the bike inspiring absolute confidence, I warmed up the pace.

Back in the pits, there was no signs of leakage, or any problems at all with the bike. All it needed was gassing up for the next session. Each session was using most of the bike’s 5(ish) litre capacity. After a proper hard-on-it session, the bike was taking about 4.5 litres of fuel. For some time afterwards I wondered if I should modify everything to increase the fuel capacity, but decided that frankly, it’s way too much hassle. In any case, in the real world this bike isn’t going to be crossing continents. I’ll make do.

 

slovakiaring sv650

slovakiaring sv650

I love how short this bike looks

Definitely didn't want to drop it due to cold tyres!

Definitely didn’t want to drop it due to cold tyres!

With no fairing it's pretty windy down the straights!

With no fairing it’s pretty windy down the straights!

Knee down

Helipad photo

Before the headlamp fairing was developed, the speedo sat in front of the yoke. The red box is a transponder for lap times.

SV076a SV077

All in all, after 2 days at the track, and not a single problem with the bike we returned home in positive spirits, ready to make it roadworthy.

 

 

Finishing the Bodywork

After finishing the fuel tank and putting the bike together it was apparent that there was a significant issue with the running of the bike. It would not rev out cleanly, and would bog down when cracking the throttle. After lots of investigation and learning about fuel injection systems, I realised I needed to introduce a fuel return valve, that would return fuel back to the tank from the fuel rail once 3 bar had been reached. For this I butchered the original SV650 fuel pump and adapted that pressure relief valve for the purpose. I was confident that this would solve the issue… but sadly it didn’t! In the end after much head-scratching, beers, swapping out injectors from my wife’s SV and many other dead ends, I tried a new set of spark plugs, and the problem vanished. Now there’s a lesson in trying the simple things first.

Having got all the main bodywork parts together, and the bike running, it was time to give the bike it’s first road test. Without yet having all the parts done yet for carrying the rear lights and number plate, the only possibility was for an off-street test. For this we took the bike to Slovakia, and two days at the Slovakia Ring circuit.

So, the bodywork was finished and painted in preparation of the big outing to Slovakia…

Assembled bike ready for paint

Assembled bike ready for paint

Sanding filler primer

Sanding filler primer

SV068

SV069 SV071

 

Finished parts drying in the sun

Finished parts drying in the sun

Assembled bike ready for testing

Assembled bike ready for testing