how many miles on it? before tearing it down you should be able to try engine flush. just dont give it any throttle! idle only! get motor warm then drain a quart oil. add the quart of engine flush. idle for 10-15 min then change oil and filter. if they dont clear up after that then they may need to be replaced? or maybe something is excessively clogged? just have to tear it down and inspect?
On Sat, Mar 16, 2013 at 8:30 AM, Allen Thomas <[email protected]> wrote: > ** > I don't know how a lifter for a NH is built but in cars it is simply a cup > and piston with a spring all held together with a c clip. The only thing to > break is the spring. Oil pressure does the real work. Most likely if they > are clacking it is because it is clogged, try soaking them in kerosine > using a dowl to work the piston. > Sent via BlackBerry by AT&T > ------------------------------ > *From: * Tim Hansen <[email protected]> > *Sender: * [email protected] > *Date: *Sat, 16 Mar 2013 01:07:24 -0700 (PDT) > *To: *<[email protected]> > *ReplyTo: * [email protected] > *Subject: *[Nighthawk Lovers] Lifter help, please. > > 84 700SC, project bike (read as basket case- it came home in boxes) I > picked up last fall. My son the bike mechanic and I have been playing with > it in our spare time over the winter and almost have it ready to go. > He rebuilt the carbs for me and put two new tires, new starter, etc. on > it, I repainted it a generic color until I figure out what I want it to > look like and have been fixing the little things like lights and wiring. > Put a new battery in it and it starts. Smoked like hell for the first few > minutes, but it also hadn't been started for about 6 years, so the rings > needed to reseat themselves. > The main problem is lifter rattle. The exhaust valve lifters are loud. My > question is, what can I try before spending a bunch of money on new lifters > to quiet them down without damaging the engine? I know nothing about > hydraulic lifters other than they're supposed to be low maintenance, in > that they are self adjusting. We pulled them out and purged them as per the > manual, but it didn't seem to help much. Since it sat for so long (previous > owner was deployed overseas), have the lifters just died? > > Tim > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at > http://groups.google.com/group/nighthawk_lovers?hl=en-US. > For more options, visit https://groups.google.com/groups/opt_out. > > > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at > http://groups.google.com/group/nighthawk_lovers?hl=en-US. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en-US. For more options, visit https://groups.google.com/groups/opt_out.
