Standard cams

[Killerwhale]

Thanks, I think I understand, but I wanted to know who sells the camshaft and if you should mount them, also because I think that changing the timing of the originals, the power gain is relative.

Well, tornado stopped production so i guess it´s only Kentcams left now. They do a set for the TDM850 wich they call "enduro" spec...gives a good smack in the low/mid range especially tourque. You have to send your cams to them as they are regrinded...
You should also think of having your head ported to gain the maximum from camchange.
ohh, Kentcams are drop in so no need to slot your camsprockets....unless you want them to produce top end power instead...

Regarding overlap, think of your inlet/outlet as a sinus wave...push them together and the inlet & outlet will be open together for a longer time. What you gain on this is that the scavenge of exhaust gas helps drawing in new gas...top end power...
The opposite is that the inlet/exhaust are open together for a shorter time wich results in higher comp and helps low end oomphhh (tourque)

[amiciangelo]

Thanks for the help, but the cost is quite high, in fact I saw the price of the catalog used in Italy and the new kit it takes about € 1200.00 , so do not mount the kit, thanks anyway.

[dandywarhol]

I think reprofiled Kent Cams are around 200/250 euros

http://www.kentcams.com/

[amiciangelo]

But how about HP are obtained with this operation? I'd like to earn a bit of HP and engine rpm.

[dandywarhol]

My TDM 900 engine has had the cylinder head gas flowed, Kent reprofiled cams, raised compression ratio and free flowing induction/exhaust. Carillo con rods are fitted but unnessessary for road use IMO.

I think you would be wasting your time and money just fitting reprofiled camshafts - the engine needs to breathe better to warrant the cam change.

The BHP isn't particularly high on my engine at 88 BHP at the wheel but it does give a very usable 68 at 5000 rpm - just where you want it

[Killerwhale]

But how about HP are obtained with this operation? I'd like to earn a bit of HP and engine rpm.

I´ve tried the kentcams and thay gave better midrange HP/tourque, very little loss on top.
If your after a gain all over put a pair of Keihins or Mikunis on your ride...although add a few 100€ and you have a turbokit installed and 160-ish HP.

[amiciangelo]

Thanks for your valuable advice, I think for now I'll make a good carburetor with K & N air filters, then this winter I'll see what I can do with carburetors plus. We will see in the future .......

[Quan-Time]

if its any help, stock lift is 8.0mm, and kent cam is 8.4mm lift. Cant comment on duration however.