it has begun!!!

[wannabfast]

ok, i have an m796, and i acquired some hypermotard 1100 cams(older not evo) and i started to tear into my engine, scary right?

i have 7200 miles on it, so its just about due for the 7500 valve check anyways, so i figured, might as well swap the cams and do the valve adjust anyways.. whats 2 extra bolts and nuts anyways?

start by removing tank and timing belt covers


then set the cams to tdc via timing mark


i broke my socket i made to get these castle nuts off, so i ended up drilling them out and using a chisel and hammer to knock off the nuts, pretty much destroying them in the process, i have new nuts so thats fine


this nut cracked in half when i used my chisel, they were on there GOOD(crappy cell phone pic)


heres what it looks like without the nut


"new to me" cam on left, stock on the right, looks like its got a little longer duration and more overlap, so more power!!!!


im calling it a night with the vertical head pretty much done, ill tackle the horizontal cam tomorrow

[Raux]

those nuts were one time use anyway

[Roaduser]

its very hard to tell and prob silly to call from here, but it looks like the cam on the right has more lift.... can u confirm which of the two cams is the 1100 cam, and maybe a better picture?

[wannabfast]

its very hard to tell and prob silly to call from here, but it looks like the cam on the right has more lift.... can u confirm which of the two cams is the 1100 cam, and maybe a better picture?

i verified the grind id and it is from a hypermotard 1100, the cam on the right is the stock 796 cam i just pulled out of my engine

[ungeheuer]

its very hard to tell and prob silly to call from here...... maybe a better picture?

true, it is hard to call from those pics.  1100 cam my actually be milder since the bigger motor doesnt like to rev so much....


 

[wannabfast]

well i can tell that it has a longer duration for sure

[Duck-Stew]

IIRC: lift is the same across the new air-cooled motor stock cams, 696 & 796 make due w/less duration.

[wannabfast]

IIRC: lift is the same across the new air-cooled motor stock cams, 696 & 796 make due w/less duration.

yea but a longer duration could make more power when fueled correctly

for reference my bike stock pulled 75hp to the wheel

[Roaduser]

true, it is hard to call from those pics.  1100 cam my actually be milder since the bigger motor doesnt like to rev so much....


 

does the 1100 also have larger valves? another reason for a possible milder lift cam being used in std form.

if its the same lift and longer duration as the op and duck-stew thinks, it could make a nice improvement with some extra fuel. all depends on the heads then i suppose.

[wannabfast]

im told the heads are identical

[wannabfast]

heads are identical, valves are not..

[Raux]

1100 are using larger valves. and the heads aren't exactly identical.
cams are just using longer duration/overlap

[brad black]

lets see if my table works

CAM   I O    I C   E O   E C   IN DUR   EXH DUR   IN C/L   EXH C/L   LOBE SEP O'LAP   IN LIFT   EXH LIFT
696/796   18   60   53   23   258   256   111   105   108   41   11.2   10.8
1000   15   65   62   19   260   261   115   111.5   113   34   11.2   10.8
EVO   14   73   66   25   267   271   119.5   110.5   115   39   11.8   11.2

so the 1100 has a little more duration, same lift and wider lobe seperation (less overlap). might hurt the middle a little a bit.

[DucHead]

Why not start by porting the head for better flow/power?

[wannabfast]

lets see if my table works

CAM   I O    I C   E O   E C   IN DUR   EXH DUR   IN C/L   EXH C/L   LOBE SEP O'LAP   IN LIFT   EXH LIFT
696/796   18   60   53   23   258   256   111   105   108   41   11.2   10.8
1000   15   65   62   19   260   261   115   111.5   113   34   11.2   10.8
EVO   14   73   66   25   267   271   119.5   110.5   115   39   11.8   11.2

so the 1100 has a little more duration, same lift and wider lobe seperation (less overlap). might hurt the middle a little a bit.

where did you get this info?