i have an 83 fxrs shovell,i am going to fit an andrews A grind cam,do i need to alter anything,have read that late shovell heads need high lift mods,any thoughts thanks,have hyd lifters as well.

Hi Clarkie,
The Andrews A grind's lift is .450, stock Shovel lift is .390.
Because of the valve guides fitted on 80 and 81 models, they are restricted to a .430 maximum lift.
This cam should be a bolt in on an 83. Make sure by checking your VIN.
Cheers,
Cris.

hi cris,will check vin,i assume this is to verify 83 model motor,thanks for your help,cheers clarkie.

 That's correct Clarkie , once you are looking at older bikes you never know what swaps have been made. 

Anyway, after swapping cams to the A grind you should find it idles as stock, but don't fall into the

"let's make it idle under 900rpm, so it makes the lovely po ta to, pause   po ta to sound", this will cause the

oil flow to fall to bugger all. End result, stuffed engine. Hydraulics are fine, and your mid range and top end 

should  improve. Having an 83, your oil pump will be adequate, but I would not recommend this cam on 

a pre 80 engine.

Cheers,

Cris

thanks cris,just checked and my numbers match,must have a rare bike with right engine,lol,thanks again for your help,cheers clarkie