Tom Yehya Racing (a kart site)have posted a service,and parts manual,under their technical section..
Bikebandit.com
There are 4 (CR8EH9) plugs; 2 in the front cylinder and 2 in the rear cylinder.
The Honda VFR 800 is a high performance motor bike and a list of dealers can be found on the Honda website. Pre-owned VFR 800s can be found on vehicle sale websites such as Autotrader.
The Honda VFR 400 Motorcycle's price range in 2013 ranges from $1,490 to $6,110. The Honda VFR 400 motorcycles were originally sold in Japan and eventually imported to the United States.
The Honda VFR is actually manufactured in Hamamatsu, Japan. It is a type of motorcycle introduced by Honda in 1998 and has been very successful in sales terms worldwide.
99.1
The Honda VF and VFR series refers to a line of motorcycles made by Honda with V4 engines. V refers to the placement of the cylinders, like the letter V, F refers to 4 cylinders and R is for Road.
I own a 1994 Honda Magna 750 which has the same engine as the vfr 750. I experienced backfiring problems. I went to my local auto supply store and purchased a can of Sea Foam. I mixed the prescribed amount in with my gas. I did this until the entire can was empty. I no longer experience backfiring problems. It was an inexpensive quick fix. Sometimes the carbs get varnish in them and may cause backfiring. Sea Foam cleans the carbs and removes the varnish. Hope this helps you.
Mobil 1, amsoil
i did
10 k's per hour
Ngk imr9b-9h.