I am putting my money on 64HP any other takers.:coolsmiley:

55HP Marcel
60HP
61HP
62HP
63HPFreez
64HP Kev, Freez
65HPFreez
66HP
67HP
68HP
69HP
70HP

maybe start from 55 HP. 70HP is I'm afraid a bit to much ;)
55HP Marjani (Marcel)

Dyno numbers differ, mostly because of tyre pressures and tyre grip, so it's hard to pick a number.

A XT with similar mods to yours, except for the cam, it ran a stage 2 Hotcam instead, produced around 57HP on my dyno.

My dyno reads very low and if my corrections are right and you get similar performance to the XT700 I tested then you should see around the 63 to 65HP mark.

Make sure they dyno shop have Dynojet's Tuning link software and that they use it correctly.

Thanks Freez. They use DT software, but I have no experience with these things, so how can I be sure they use it correctly? I also was wondering, do I need to unblock the AIS hose before the run?

Cant wait to see your results, maybe a monster Tenere in years to come:jumping0006:

AIS must be blocked.:ky:

The best advice to give you is to make sure the dyno centre uses the Dynojet Tuninglink software.

Then from your side, make 100% sure the AIS is blocked off and that the exhaust joints are sealing 100% and that no exhaust gas is leaking out. When the bike is cold, start it and feel with your hands around the joints if you can feel air blowing out of the pipe. You need to be quick as the pipes warm up real fast. If you find a leak, you need to remove the exhaust, put some very high heat tolerant silicone sealant in and around the joints and bolt the pipes back.

When you get to the dyno, ask them to open the help file for the Yamaha Raptor 700 and use the settings as per Dynojets recomendations. Also ask them to use a very long probe to suck the exhaust gas from the header pipe and not just from the silencer itself.

For slightly more top end power you can ask them to tune full throttle for an Air Fuel ratio of around 13.4

thanks a lot Freez for the tips. Will keep that in mind for tomorrow.
I'm sure the pipes are sealed. I allways use special exhaust sealant around the joints, I know that they leak when not using sealant. Also I allways use new exhaust gaskets at the header manifold.
AIS is blocked.

Greetings from a cold Holland,

marcel

dyno run result
 

Well, I can tell you this was a hell of a day! First the dyno centre called me this morning to cancel our appointment. The guy who was supposed to do the run had become ill. So I needed to find my another dc for today's run. After calling 4 different dealers I find me the nearest dealer at 185km distance! This dealer was the first one who knew about Raptor 700's and Xt660's, so that made me very happy.
So I jumped into my car, but my car wouldn't start - dead battery because of the coldness. So after asking my neighbour to help me (yeah Toyota; hell MB!) my car started again. Then my tomtom died! Guess also because of the coldness. So graped by zumo, programmed the route and finally left home.
At the dc first I needed to explain about the mods and raptor 700 dyno help files. Luckely the gentlemen who helped me knew a lot of bikes. Once the bike was settled up to the dyno machine, we started for a run. This went without any problems.
Once trying to create the new mapping with the tunelink software the problems started again. We couldn't get a good/stable signal from the spark wires to read out the rev's. After calling to dynocenter main dealer, we finally managed to get a stable rev and we could make the custom mapping.


And now for the results:
max power: 63,3 HP
max torque: 75,6 Nm

To compare the results I asked them if they had one from another Xt660 run. They luckely did, so they put that one also on the dyno results.

Compared to the estimated 55Hp I was a bit surprise. Freez and Kev are the winners, concratulations ;)

Next mod I'm thinking about is a +2mm TB. Although I have to drive again 2x 185km for that to make a new mapping, I think we will be able to make it to 65 HP.

Greetings from a very cold Holland,

Marcel

Well done mate I am proud of you. This is a good result.:icon_cheers:

Going by the Raptor results you would get 2.5 to 3 hp gain with your set up using a +2mm throttle body, so should be around the 66HP range.

With my +2mm throttle body I can feel the extra pull up top & guess mine is around 59/60HP, I have swooped the throttle bodies & cams around a few times on my bike to see the pro's & con's of the throttle body & can't real find any reason not to remove the +2mm off my bike.

I think we must change your title to KING OF THE HILL

The results

63.31HP
55.81Ft-LBS Torque

Marcel did you get the Run file off the Dyno saved to a pen drive, if so please E-mail it to me so I can see the runs. Just interested in the below 3000rpm results.

Please send me your fuel map so I can add it to the map section.

I have added the results to HP results post.

http://www.xt660.com/showthread.php?t=4509