Viper Pipes

REDSNAKE,possibly in short drag runs at wot but you could never actually trail ride those pipes with that jetting, the midrange cruising with a viper, head,timing,would lead to a seized piston in no time. I have fixed alot of viper burned down with pipes and they almost all are mid range burn downs, you need ALOT of fuel with those pipes to cool off the pistons from the lousy head cooling,timing is pretty significant in midrange and the fuel will cool the piston enuff to resist detonation which in turns ruins the pistons, cylinders and sometimes crank bearings.
 

i actually did trail ride the sled alot of kms like that, but my trail riding is kinda all throttle or just a little. could you pm me a price for a head mod on the dcs head?
 
I dont do the 1 peice heads, the lathe does not have a big enuff swing for me to do them, I could do them on the cnc machine but it would need a program written to do them, there just isnt enough call for me to bother with them, sorry. Your better off to have Jeff@CPR or Bender do them for you as they are set up to do the mono heads.
 
if you have cpr pipes, youll need 50 pilot jets, 1.75 turns out on screws, needles on #4 and with both shims under the clip on the mag cylinder, and 160,160,162.5 mains.

You also might want to call Jeff@ CPR, I know he has had a few differnt specs for jetting for these over the years, he may have a leaner spec for ya to use, his number is 414-698-6611
 
When i talked to the guy at hauck he advised going with carbs not vented to box and jetting 150 across 47.5 pilot needle at 4 with washer top and bottom??? I am at 1880 feet and around -10 to -20 range (deg cel).
 
You must log in or register to reply here.


Back
Top