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Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Wed Apr 05, 2017 6:21 pm
by 666damned
loving your work ...and eye for detail..
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Sat Jul 15, 2017 11:14 am
by Hobbit
Do you know what weight the bike was originally and what it weighs now? Just out of curiosity.
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Sat Jul 15, 2017 10:46 pm
by Dominik
Hi,
The bike was 176kg stock. Now it's around 130kg without fuel both. However there have been some more updates last time which haven't been updated here yet.
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Sun Jul 16, 2017 12:17 pm
by Dominik
So I´ll finaly update this thread again
After fitting the Mv Agusta F4 Fairings and some other minor changes like fork and loom and enginge tuning it was time to get the bike on track. First challenge should be a 2h endurance race on the Nürburgring GP track which is quite close to my home. So I´ve got everything packed, put slicks on and was ready to race. During one hour of free training the bike felt pretty good and did what it was supposed to. The koso lambda meter showed that it was running slightly rich and as I had the db-killer in the power wasn´t 100% as good as in test rides. Following the air-fuel-ratio I modified the airbox inlet and got good values during the qualifying in which I pushed the bike and myself a little more to our limits. However the bike still felt great.
It came to the race and I did almost one corner till the engine failed
I was on the brake and when I opened that I noticed that the engine wasn´t running anymore. The bike wouldn´t bump-start anymore as the rear wheel was stuck/ blocked. No chance to get everything fixed at the weekend but I found a damaged camshaft that day so that was it. Time to get home and see what´s wrong...
Finally the one cam cover was knackered and I assume oil pressure got lost there as the camshaft bearing on cylinder 1 outlet was the only one which was totally damaged, all others had normal to heavier signs of wear for an 8000km enginge. Theoretically the polished head should go to the waste now but I didn´t like that why I´ve decided to rebuild it.
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Sun Jul 16, 2017 12:21 pm
by Dominik
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Sun Jul 16, 2017 12:41 pm
by Dominik
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Sun Jul 16, 2017 12:55 pm
by Dominik
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Wed Jul 19, 2017 10:07 am
by Dominik
Rear Brake: Don´t know if I´ve mentioned it here before but I´m gonna fit a mountain bike caliper to my racebike. It is a 4 piston monoblock with 160g only, the Magura MT5. This will be used with a 200m diameter brake disc wich is 3mm strong (weighs 333g w/o holes, 233g w/ them)
Yesterday I manufactured the necessary bracket for it out of Aluminum 7075. As I don´t have any special CNC tools or such it is easy constructed and handmade... However it weighs only 150g so I conclude the rear brake to a total weight of only 650g!!! The oem construction weighs 2900g!
Manufacturing
Downside-Up test
Almost final edition using the swingarm to take brake force
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Wed Jul 19, 2017 10:59 am
by Dominik
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Wed Jul 19, 2017 5:34 pm
by banner001
vacuum pump...autoclave...carbon frame...you know it makes sense
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Wed Jul 19, 2017 6:00 pm
by Dominik
Sounds like I finally found a sponsor
You!
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Wed Jul 19, 2017 6:45 pm
by banner001
i actually have access to a 7 cubic meter autoclave, and vacuum pumps, so easily big enough for a frame...dont know if i would be able to maintain the vacuum when its autoclaving as the tubing would be crushed and i dont think that autoclave has ports to feed in tubing...
plus its in england, and i cant imagine its that easy to make a frame mould with metal inserts in...though i do have contacts at ducati uk, tata and JLR...
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Wed Sep 20, 2017 1:08 pm
by Dominik
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Wed Sep 20, 2017 10:26 pm
by banner001
Re: German Zxr 400 L3 - Lightweight & Road Legal
Posted: Fri Oct 27, 2017 3:38 pm
by ziky112
Hi,
Nice bike!
Im building track day zxr too. Maybe we can share some info. How are you e.g. satisfied with vacuum fuel pump and koso tach?