Project 680RR

[xrmanu]

More or less 210 Km/h at 8300 rpm. 

Bye

185 a 190 realistic (chrono) but monster acceleration even with that gearing.Big bore is good for torque and acceleration but top speed suffers a little.To win top speed and temper the low end hit a bit , I have to degree the stage 2 cam a little.

BTW:he makes power till 9300/9400 rpm  ,don't sign off like a stock bike at 6000 rpm.

[beppoxr65o]

I think 15*38 is for "off-road" use 

for off road use??    Seems too long 

185 a 190 realistic (chrono) but monster acceleration even with that gearing.Big bore is good for torque and acceleration but top speed suffers a little.To win top speed and temper the low end hit a bit , I have to degree the stage 2 cam a little.

BTW:he makes power till 9300/9400 rpm  ,don't sign off like a stock bike at 6000 rpm.

What do you mean when you say "to degree stage 2 cam a little?"

What a monster your bike!!  The best xr i've ever seen....

[xrmanu]

for off road use??    Seems too long 

What do you mean when you say "to degree stage 2 cam a little?"

What a monster your bike!!  The best xr i've ever seen....

Mhh...I rode with 14 x 38 on the Mettet Road race circuit.... Sometimes I do things differrent.

I think it flip over till 5th gear with 14x48 enduro gearing.

You can alter the Cam timing so that the low/mid hit is softer and that you have more top end and speed.But you have to know what/how to do...  (valves/piston clearance etc..)

[Phyl]

I think it flip over till 5th gear with 14x48 enduro gearing.

I use 14x45....... it would be nice the 6th 

You can alter the Cam timing so that the low/mid hit is softer and that you have more top end and speed.But you have to know what/how to do...  (valves/piston clearance etc..)

Well said!
Even better if at high rpm the bike wheelies! 

[Bracco]

Hallo Manu.

Do you know how many HP have your beatiful bike ?

Bye

[xrmanu]

The last time on the dyno - a few years back- I had around 61Hp on the wheel .That was with a Monnier exhaust line ,Mikuni TM 40,HRC piston,stock cam,1mm oversize intake valves ,airbox mod and without backfire screen. I don't know how accurate the dyno was but a stock 650r with a full Akra /jetting/Airbox mod + Twin air had 56 hp that day.

I now  have extra: stage 2 cam,lighter flywheel ,Falicon, rod, 680cc,racing CDI, FCR43mm and the Patevo exhaust.Next step is a larger volume airbox and some jetting +dyno runs to get the jetting perfect with that. This should give me 3 to 4hp more ,they told me.



This is an even older dyno : 56.3hp.
Mods than were: - completly stock motor
                  - Mikuni TM40
                  - CRD headers + Leo Vince X3 can
                  - airbox mod + No Toil filter + home made screen (no backfire screen)

[Bracco]

Thanks 

[xrmanu]

Some footage from the ride out last Sunday ... a SM girly goes down...

http://www.youtube.com/watch?v=R-dCTa4_iU8re

More:

[Bracco]

The streets are very wide and comfortable  :D :D :D :D :D :D :D :D :D

Bye

[xrmanu]

Yes... as we like it... narrow and dirty. 

[after]

...ok, i stay in that zone many times, but... why don't ride in the centre of Antwerpen??? ...

[xrmanu]

...ok, i stay in that zone many times, but... why don't ride in the centre of Antwerpen??? ...

Yeah..the offroad zones are great there.... 

[paulogas]

beautiful video !!!!   motard is wonderful     


 

[beppoxr65o]

I saw more pics about your bike  on supermotojunkie.... Very interesting the crf steering dumper.....seems quite easy to fits on xr frame..which benefits did you find on motard road race?
But the most intersting thing is your lighter wiseko piston quite matching the hrc piston weigh! 

[xrmanu]

Yes, we dropped the weight of the 102.4mm Wiseco 52g and made the Wiseco piston pen lighter than the HRC one,so there was in total just a few grams difference between the 2.   Should be good to keep the crank alive and reliable @ + 9000 rpm.