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help with supermoto set up for '10 450fe

jkl

Joined Aug 2009
43 Posts | 0+
Vancouver Island, Canada
So I got a good deal on some 17" supermoto wheels and tires for my 2010 Berg 450fe that has an Akro exhaust.
I have the map switch and 3 different throttle cams and the bike is set up for Northwest technical trail riding.
So of course I want to switch between supermoto set up and trail riding.
I will be riding on the road maybe try the track for fun.
What size sprockets for supermoto and 2 chains?
The front wheel comes with a big rotor so I need a relocation bracket - are the stock brakes adequate?
The front tire rubs a bit on the fork protectors and the rear 4.25 with tire seems to fit with a little trimming of chain guard.
What about suspension? I need to get my forks tuned after 130 hours of trails. What is the best compromise so I can just play with clickers?
Any advice appreciated.
 
Hi jkl.

In my opinion you don't have to change alot IF only play riding when the SuMo wheels are fitted. The suspension will be soft and dive under braking. The brakes will cope fore play riding but you'd better bring some braking fluid with if you're hard on the brakes and they start boiling. (I've heard of guys SuMo-racing with the stock FE brakes but I wouldn't do it...) Fork protectors need a bit of grinding/trimming if you want the tire to move freely. Maybe it's possible to mount a set of older fork protectors which has a groove for SuMo-wheels?

I don't think it's possible to find a good enough compromise to switch between SuMo and enduro with just changing the clickers on the suspension, there's to much internal differences. Buuut with that said... for play riding you will be fine. Sure the forks will dive but you'll stop noticing it after a while. At least until you try a SuMo spec suspension. :twisted:

I solved it by having two sets of tires, suspension and brakes. (I did ride it without FS-suspension for two years but with Beringer SuMo 4-pot caliper) I'm not sure what gearing I have on right now I just know I have two sets of chains depending on wheel setup.

You will have a blast even with the standard brakes and suspension, just be careful not to boil the brake fluid! Boiling brakes are no fun. At all. *been there done that* The difference in gearing depends on riding style and where you ride but I'd say some where between 2 and 4 tooths smaller sprocket in the rear when riding SuMo should be ok? First time out you can use the gearing you already have and then you'll know if you need to change the gearing. (and chain) Sprockets are relatively cheap and it's a good idea to have some in the toolbox just in case.


Regards

/Nick
 
Thanks for the info - of course there will be a compromise!

The wheels came with a 320mm disc and a 46tooth rear sprocket. I still have a 14tooth front from my KTM so I will try that combination.
A set of closed cartridge forks would be nice for trail riding too.
 
14/46 would be crazy low gearing. It would pull at 10 mph in 3rd gear and hit 6th at 45 probably. Top speed <70 mph.
16/46 will be good for street, and 15/46 for the kart track or dirt play.
 
Stock sprockets are 13/52 so I thought 14/46 would not be too bad?
 
It just might be ok, since stock gearing is what it is.
Try it out and tell us what happened, I'm curious.

I think Idle is referring to a 00-08 bike.
Stock gearing on a FS450 -04 was 15/42 so 14/46 would be quite useless... But I guess it would be kinda cool to tell all your friends that you went WOT in 6th gear. :lol:


regards

/Nick
 
I ordered a brembo brake caliper carrier for the 320mm rotor from my dealer and it does not fit the stock caliper pins.
It must be made for a bigger caliper.
Is there one available to work with the stock caliper or do I have to get a bigger caliper?
 
Isn't there another threaded hole (next to the lower pin) so you can move the caliper pin? Do you have a picture of the carrier? I used to have one but can't remember exactly where the holes are.


regards

/Nick
 
Thanks for your help Nick :D - how is the weather in Sweden, any sign of spring yet or are you still in deep freeze?

No other holes on caliper or carrier. I put the wheels on today with the stock rotor and used 15/50 sprockets with the stock chain and it seems fast enough, I may try a 14 in the front.
The front tire wore a groove in the fork guards right away, and I had to shave the chain guide a bit for the 15 tooth sprocket, and take off the chain guard.
I will talk to my dealer about the carrier. Now for some warm dry weather please!
 
The weather is hm... different depending on where you are. Surprise! :lol:
The deep freeze stopped yesterday, not that it was that cold just a modest -14°C outside my window when it was as its coldest. :bounce3: Some parts of Sweden have had some seriously low temperatures during this winter but not where I live. Today I even had a bit of spring feeling since there were no degrees below zero, but I guess that natures gonna give me some of that "The day after tomorrow" temperatures just for writing the word spring. :lol: I don't think that spring is coming just yet, but it can't be that far away. (hardly got any snow either)

How's the weather in Canada? 4 meters of snow, -25°C (on a warm day) and polar bears running amok in the streets? :mrgreen:

Yeah a little blast of that infamous Chinook wind to melt away the snow would be nice. :D


/Nick
 
I found out that the brake caliper changed in 2009 and the carrier I bought was for the larger caliper on the older bikes. Aparntly the same brake pads fit in both, but the pins are wider apart on the pre 2009 brembo calipers.
 
Guess who got punished for thinking about spring? Got another 5cm of snow and the deep freeze is back again. :twisted:


Have you got the part you need yet? :)


regards

/Nick
 

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