Dennis, In the picture you marked up (and the other 5 i attached) the crank is definately at TDC as perfect as the eye can be and the crank had been rotated in the direction specified in the manual.
I don't have a scanner so here are the exact instructions from the Honda 650 manual on pg 6-19,20 1. Turn the crank counter clockwise and align the "T" mark on the pulse motor with the index mark on the crankcase 2. Set the cam sprockets onto the camshafts with the timing marks facing to the right. 3. Place the intake and exhaust camshafts through the cam chain and into the cylinder head with the No. 1 cam lobes poiting up. 4. Place the cam chain over the cam sprockets. The "up" marks should be facing up as shown (it shows a picture with "UP" at the top of the sprocket as it is installed in the cylinder head) 5. First align the IN mark of the IN sprocket with the cylinder head surface. Align the sprocket bolt holes by turning the crankshaft clockwise and install the intake sprocket bolt. 6. Then turn the crankshaft to align the EX mark with the cylinder head surface as shown and install the sprocket bolt. 7. Rotate the crankshaft, and install the remaining cam sprocket bolts. 8. Tighten the four cam sprocket bolts to the specified torque. The way I read it, is at TDC on the compression stroke 1) the cam sprockets should both have "UP" at the top of the sprocket 2) the #1 cylinder cam lobes must point up and 3) according to your notes, the IN and EX marks on both sprockets should all be lined up (this is the part the Honda manual really confuses me on, but i think they want the IN mark on the Intake sprocket and the EX mark on the Exhaust sprocket to be alligned with the cylinder head surface - maybe that would make all 4 marks line up to each other as well?). I think the cam sprockets in my 650 were installed upside down because on the picture you sent back with TDC alligned, and the #1 cam lobe pointing up, the cam sprockets should have "UP" at the top just as in this picture (only this is at TDC of the exhaust stroke) http://16481440758028870596-a-g.googlegroups.com/web/650+CAM+TIMING+Exhaust+Stroke+CAM+Sprocket+Position.JPG?gda=eaHdIWkAAACTdSkmtVVI9OXF2ygg83pH-2Bfsuxgn9oyE9mWUwcnz4D6S9ll8ZdT99gjzGPGu4NiLzl7u0-jTC7LUbn2SDpGVe0_5cnVeRaEbz8CeVVlPkJh5MenIyGLBNESi9y05ByECKgQbmraGdxlZulaYnsh&gsc=F0q8EwsAAAD38wzirucqs8P_zxsE_Nnc Do you also think the cam sprockets are updside down in comparison to the Honda manaul? Sorry to be such a pain and I hope I haven't made this too confusing (it's tough to explain in text messages). Thanks again, Paul On Sep 5, 8:11 pm, Dennis Hammerl <[email protected]> wrote: > I don't have a 650 manual in front of me. I don't remember them building from > the right side. Oh well, 700's build from the left. In other words, indicator > and cam marks are on same side. I can scan the 700 manual page and send it. > Check this out. Your alignment is out if this picture was taken with the > crank at TDC. > > --- On Sat, 9/5/09, oldschoolgwin <[email protected]> wrote: > > From: oldschoolgwin <[email protected]> > Subject: [Nighthawk Lovers] NH 650 Valve timing - please help Dennis > To: "Nighthawk Motorcycle Lovers!" <[email protected]> > Date: Saturday, September 5, 2009, 7:05 PM > > Dennis, > > Before changing the cam chain tensioner i inspected the timing marks > against the Honda official manual so that i could make sure to > duplicate the exact positions. > > But I thiink the cam timing is not setup correctly to begin with - > but > i'm not possitive. > > I set the "T" mark at the TDC index on the compression stroke (cam > lobes up on #1 cyl) but the cam sprockets are "down". See picture > files i uploaded to the files section. There are 3 files > name .....comression stroke... that show the various comonent timing > while at TDC. > > "T" Mark at > TDC:http://16481440758028870596-a-g.googlegroups.com/web/650+CAM+TIMING+T... > > http://16481440758028870596-a-g.googlegroups.com/web/650+CAM+TIMING+C... > > http://16481440758028870596-a-g.googlegroups.com/web/650+CAM+TIMING+C... > > http://16481440758028870596-a-g.googlegroups.com/web/650+CAM+TIMING+C... > > Then i rotated the crank one revolution exactly so now it is at TDC > on the exhaust stroke. In this case the the cam sprockets are up and > the #1 cyclinder cam lobes are down. > > http://16481440758028870596-a-g.googlegroups.com/web/650+CAM+TIMING+E... > > http://16481440758028870596-a-g.googlegroups.com/web/650+CAM+TIMING+E... > > http://16481440758028870596-a-g.googlegroups.com/web/650+CAM+TIMING+E... > > Does it look like the cam sprockets were installed 180 degrees out of > phase with respect to the #1 cyclinder cam lobe position. It seems > that this would also caus the valve timing to be off slitghtly. The > bike currently runs a little rough at idle, but pulls really hard from > 3000 rpm up to 7500 and then at 7500 it pulls harder. > > Thanks, > > Paul > > 650+CAM+TIMING+Compression+Stroke+CAM+Sprocket+Position+Mark#4.jpg > 596KViewDownload --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en -~----------~----~----~----~------~----~------~--~---
