Triumph Rat Motorcycle Forums banner
  • Hey everyone! Enter your ride HERE to be a part of this month's Bike of the Month Challenge!

1 - 3 of 3 Posts

·
Registered
Joined
·
5,609 Posts
Discussion Starter · #1 ·
I'm going to discuss modifying cam timing on my 790cc T100 with a local independent speed and tuneup shop. I have the timing specs for my 790 T100, but have misplaced the 865 cam timing info someone on this forum sent me a while back. Could someone pull out their newer Triumph Service Manual and send me the following info for the 865 engine? It'll make it easier for me to discuss these potential mods with the shop personnel. I plan to plot stock 790 cc and 865cc stock timing on a degree wheel, then plot modified timing next to this data. Thanks (again).

Intake opens (BTDC)
Intake closes (ABDC)
Duration (Degrees)
Exhaust opens (BBDC)
Exhaust closes (ATDC)
Duration (Degrees)
 

·
Registered
Joined
·
140 Posts
Intake opens (BTDC) 4'
Intake closes (ABDC) 48'
Duration (Degrees) 232'
Exhaust opens (BBDC) 33
Exhaust closes (ATDC) 7'
Duration (Degrees) 220'

All at 1.0mm lift

Cheers
 

·
Registered
Joined
·
5,609 Posts
Discussion Starter · #3 ·
Thanks, NZ

Bob
 
1 - 3 of 3 Posts
Top