rpm

Hey all. First post on this forum. Hopefully it makes sense. Bike Info: Bike is a 1975. I rebuilt the entire engine myself. Running stock alternator with a Boyer electronic ignition. Kick start only with a lithium ion battery. Rebuilt the carbs, new fuel lines with inline filters, and rebuilt...

I have a 78 650 special with mikes commando exhaust, uni foam filters, and VM 34s. When riding it will take a good bit of throttle to get up to about 3000 rpm and then after that it takes off. Would one of those torque inserts be what i need? It also has trouble getting past 5000 rpm any ideas?

Okay so I'll give you guys the whole story without going overboard here. I got this bike when I turned 21 from my dad. It was sitting in a barn for years but a good friend of ours fixed it up and sold it to him. As soon as I started riding there were all sorts of problems. Bad connections, old...

Hey everyone! I'm new to this whole community a appreciate the amount of help I've gotten. I'm currently putting a 79 back together and I'm to the test drive point if things. The bike idles great, and revs out normal sitting, but on the street it seems to break up under 3k rpms then run...

Came from an 82 heritage special, works perfect even back lighting. Also have tachometer cable if needed Shoot me an offer

I don't have an RPM gauge and don't plan on using one. The PO removed the cable complete and put some weird copper plumbing screw in place of the tach drive retention bolt. I know it is smart to keep the hole for testing etc, but I still don't plan on using it. Question: Can I remove the gear...

so i picked up a 1984 yamaha maxim 400 and it leaked allot of oil and would rev to about 8000 then pop and sputter a bit so here is what i did i took the hole top end of the motor off took pistons out cleaned them and put it back togather allso to note i took one piston out at a time. put it...

Hey guys, today I took my bike out to go to work and it started right up but it cut off by itself which isn't normal bike had been running perfect. So I get it starting again and take off up the road, but every time I hit about 4k rpms the bike would studder and hesitate like it wasn't getting...

I am in the slow process of getting the old XS drag bike back on the strip. Looking for a tach to use and found an Autometer 3690 that might? work. Called the company customer support and they were pretty clueless with info that would lead me to believe it would. Just stated that it works with...

Alright... I got a Pamco installed on the XS last night. The bike fired right up and sounds great at idle. Set the timing with a light and thought I was good to go. However, as soon as you crack the throttle, the RPM's shoot way up and hold steady. I'd say around 3k. They do not drop down...

I was riding my bike today and on my way home I stopped at a light and my rpms weren't dropping and it seemed to be increasing. The only way I could get them to drop was to release the clutch about half way before it would stall. Any ideas on what this may be?