1994 Suzuki RF400R





General Comments:

My RF400r is what biking is about.

Being able to jump on the bike, hitting the starter button and knowing it's going to start. Heading out into the hills and having the time out your life.

I can't say enough good things about the bike, I will being moving up to a RF900... there's just something about these bikes... they are so understated!

Would you buy another motorcycle from this manufacturer? Yes

Review Date: 6th May, 2007

9th Jul 2009, 06:49

I have a Suzuki RF 400R. The carburetors were set and the plugs changed since that the bike will only start and ride for 2 days, then the plugs are shot. If you replace the plugs again, the same problem will occur. Can anyone that has had this problem before, please give me some advice as this is becoming expensive. I am very desperate.

13th May 2013, 14:27

You need to get a new digital igniter electronic board, which is right under your seat. When it dries out with time, electrical boosts take place and burn out the sparks.


9th Aug 2015, 12:19

If the spark plugs are very black and sooty when they come out, then there are 4 sets of o-rings in the carbs which need to be replaced. Also if the float heights are set wrong, it can cause this. Hope this helps :)

22nd Oct 2017, 07:25

I have an RF400R with the same problem. Put in ek9 NGKs... and new coil packs leads... and it runs very clean and aggressive. Drove like a 70 to 80km distance... So I switched it off and on after an hour... and there's the same problem... plugs are burnt... and it's new plugs...

18th Mar 2018, 07:56

Hi, I have the same bike, a Suzuki RF400R. I looked up these questions because I have the exact same problem... The spark plug that they gave me for this bike gives two spark, but then you have that problem... Take the spark plug and bend the two tips a bit apart... I saw this through holing the spark outside and starting to see how the spark is, and I saw how the further the spark block's held away, the faster the spark, so I bent it open and that was the problem; it runs smoothly now with no problem... And you'll see everyone has got the same problem with the spark. Really try this; it will work I promise.