351 Mod
#21
Timing is easy if you look at the pic I posted. Make sure when at TDC the IN and EX marks on the cam are level with the head. Count 32 rivets on the chain, and make sure the 32'nd rivet lines up on the mark on the other cam..
See what I mean? You'll get it, no sweat.
See what I mean? You'll get it, no sweat.
#22
Timing is easy if you look at the pic I posted. Make sure when at TDC the IN and EX marks on the cam are level with the head. Count 32 rivets on the chain, and make sure the 32'nd rivet lines up on the mark on the other cam..
See what I mean? You'll get it, no sweat.
See what I mean? You'll get it, no sweat.
#25
Army, i hope you indexed the rings to the proper position prior to putting it in the cylinder.
An easier way is to use a large hose clamp from the hardware store and slightly snug it down over the rings using lots of oil.holding the cylinder square over the piston and gently lowering it, will slide the hose clamp down and off the rings as they are compressed and slip into the cylinder.
The wrist pin should be a good tight slip fit into the piston as well as the connecting rod.
Not a press fit, not sloppy, just a good tight slip fit. if you can easily rock the piston back and forth, as well as slide it side to side on the pin, you are good.
if you were able to push it in by hand ( a strong hand) you are ok. once you have it all assembled, minus the valve cover, get out your wrench and turn it over slowly by hand with the spark plug out.
go at least four full revolutions, and check the timing marks again prior to putting the valve cover back on. remember to go counter clockwise so that you have tension on the cam chain pulling down to the front of the crank gear.
An easier way is to use a large hose clamp from the hardware store and slightly snug it down over the rings using lots of oil.holding the cylinder square over the piston and gently lowering it, will slide the hose clamp down and off the rings as they are compressed and slip into the cylinder.
The wrist pin should be a good tight slip fit into the piston as well as the connecting rod.
Not a press fit, not sloppy, just a good tight slip fit. if you can easily rock the piston back and forth, as well as slide it side to side on the pin, you are good.
if you were able to push it in by hand ( a strong hand) you are ok. once you have it all assembled, minus the valve cover, get out your wrench and turn it over slowly by hand with the spark plug out.
go at least four full revolutions, and check the timing marks again prior to putting the valve cover back on. remember to go counter clockwise so that you have tension on the cam chain pulling down to the front of the crank gear.
#26
gary, just so i'm clear on the piston. (forgive my lack of correct verbiage). The pin (more like a tube) that holds the piston onto the piston shaft might be tight? Is that what you're saying? Mine was quite tight. I put one ring clip in on one side of the piston and then when i tried to slide the pin (again, looks like a tube) into the piston, it went in very tight. I had to tap it in slightly. Then i put the other retainer ring on. Is that normal?
#27
Jetting
I also need to know what those of you at sea level did to the carb after installing the 351 kit. I've got the 128 needle and stock pilot jet right now. The rest of my carb settings are in my signature block. Can I leave it alone or do I need to change anything out?
I'm planning to do the carb breather mod at the same time as long as the whole thing is apart anyway.
"Hello Gary,
What ever jets you have in the bike before the kit was installed go up one jet size larger on the pilot & two jet sizes larger on the main.
Thanks
Bill "
BTW, change your SIG to "installed"
#28
Gary, thanks, I did index the rings before I installed the piston. I called BB just prior to installing the rings and he told me how to do it. Thanks for the info on the carb. I can't wait to finish this up. I picked up a torque wrench tonight so I can get the head bolts tightened. I read Larry's post on the timing, plus I went through the manual and it seems pretty straightforward. I also bought a set of feeler guages so I can check valve clearance as long as I'm in there. I'm hoping to have some time to work on it on Wednesday. I also ordered some fuel line from RMATV so I can do the carb breather mod at the same time. Last summer I got stuck in a couple of deep water crossings and I don't want it to happen again... Thanks again
#29
Good pics and write up .... be sure to follow up with the final results.
Oh, on your tdc mark pic ..... make sure everyone knows that when you hit that mark you are either tdc or 180 degrees out...but I bet most that would do this know that.
Oh, on your tdc mark pic ..... make sure everyone knows that when you hit that mark you are either tdc or 180 degrees out...but I bet most that would do this know that.
Last edited by Finger Mullet; 03-02-2010 at 12:36 AM.