Anybody run a lightened flywheel on their 650. It made a difference on my CR500 and am thinking of trying it on my 650.
Joined Nov 2012
2K Posts | 821+
Iceland
Try this thread!: http://husaberg.org/mechanical/17329-balancing-80mm-650-crank.html
It's a great read. It's primarily about crank balancing for counterbalancer removal, but by necessity it touches upon weight removal - and has leads for further exploration.
It's a great read. It's primarily about crank balancing for counterbalancer removal, but by necessity it touches upon weight removal - and has leads for further exploration.
I run a FC MX flywheel on my 650 FE for MX and it is more responsive and revs quicker.
Thanks for the info!
Do you think an even lighter flywheel would be of benefit?
Do you think an even lighter flywheel would be of benefit?
I have heard on here, Facebook, and other web page regarding running a lighter flywheel and its benefits. Since I want to retain the eStart/charging I have been diligently and with some struggle to find a nice used 04-08 flywheel in the price range I am willing to pay.
It appears I found one and will be doing the same lightening mods I did to my MSV Racing CR500 lightened flywheel which I love.
Once this happens I will run the OEM weight and vs lightened back to back on the same trail and give my thoughts.
I am trying to load a pic of the MSV Racing modded CR5 flywheel and Photobucket is acting up lol
It appears I found one and will be doing the same lightening mods I did to my MSV Racing CR500 lightened flywheel which I love.
Once this happens I will run the OEM weight and vs lightened back to back on the same trail and give my thoughts.
I am trying to load a pic of the MSV Racing modded CR5 flywheel and Photobucket is acting up lol
Joined Jun 2007
4K Posts | 1K+
south east WA Australia
Joined Oct 2014
202 Posts | 49+
Jacksonville, Oregon
If it's anything like the other MSV Racing CR500 builds, it should be a rocket! MSV Racing is world famous for building CR500 motors! 
Here is a pic and the weights I have for the 08 Husaberg fe650- 832 gr, 91 CR500- 566gr, 91 MSV Racing CR500- 441gr, and 08 KTM 505 XC-F/SX-F- 426gr
My plan is to reduce the circumference and weight of the Husaberg and KTM flywheels at least as much as the MSV Racing's CR500 -125gr, -2mm off circumference and -2mm off the face.
I have a plan mapped out and hopefully next week I should have one of the 2 done. I suspect I can get more weight off both since they are billet.
My plan is to reduce the circumference and weight of the Husaberg and KTM flywheels at least as much as the MSV Racing's CR500 -125gr, -2mm off circumference and -2mm off the face.
I have a plan mapped out and hopefully next week I should have one of the 2 done. I suspect I can get more weight off both since they are billet.
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Joined Nov 2001
17K Posts | 774+
Ely, England
the rule of flywheels is that they should be broad in daimeter and carry their weight near the rim. this gives them the most momentum.
also, a 650 loses a lot of momentum coming up on the 4th stroke which is the toughest stroke: the compression stroke.
but it has to be said that the FS/FC flywheel does pep them up!
regards
taffy
also, a 650 loses a lot of momentum coming up on the 4th stroke which is the toughest stroke: the compression stroke.
but it has to be said that the FS/FC flywheel does pep them up!
regards
taffy
Joined Oct 2014
202 Posts | 49+
Jacksonville, Oregon
I am going drastic.
What do you consider slight, as in how many grams less weight than OEM?
Joined Jun 2008
1K Posts | 98+
Simi Valley Ca.
I wouldn't be too sure but maybe from the oem 832gram down to around 700? Its all new to me anyway.Testing would be best as you say.
It just so happens I have 2 650 flywheels. I will drastically lighten the first one and give a review. If it is awesome I will machine the second the same and put it up for sale. If not I will cut the reduction in half and go from there. Stay tuned for a ride review with GoPro in August.
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