Looking for advice on GN250

**NOWOOL** · 6th February 2009, 18:59

Yes, in strong side winds (IE: 50 kph+) it does push the front end around a bit, but still controllable.
It does appear to make the bike more aerodynamic. my top end went up about 5 kph (137 kph with light headwind on flat ground). I haven't noticed any difference in fuel economy.

**Fumph** · 6th February 2009, 20:56

That's very interesting thanks. I went and had a look at a couple of internet sites in the states and they appear to be well thought of. The Givi site in Italy doesn't mention the A755 as fitting the GN250 so it is good to know you have fitted it ok. I saw the pics of your GN and it looks fine.I was wondering about your top speed for the GN 137 kph! that is the fastest I have heard anyone doing on one. I have had mine to 120 with a tail wind but 110 is about what I get normally. Have you modded the exhaust/air intake carb etc?I was hoping the faring would give another 10 kph and ease the wind buffeting at 100 kph.
There is an agent for Givi in NZ and I have emailed them for prices etc.

**hayd3n** · 6th February 2009, 22:07

130kms for my partners gn which now needs a rectifier/regulator
seems pretty stable but hard to stop in the wet(at 50 kays ) unless you use footpegs indicators/mirror as a brake

**Fumph** · 7th February 2009, 08:27

Well 130kph is fast for a GN250... sorry to hear about ur partner's slide, hope is okay. I have fitted Pirelli City Demons in the hope that the risk of that will be reduced. I am still curious about the variation in reported top speeds for GN250s. I read some comment on a US site about it and the concensus was why would you bother to make it go much faster as it gets unstable...but you can by drilling holes in the exhaust and taking the cover off the air cleaner and enriching the mix in the carb. But is it worth the effort?

**NOWOOL** · 7th February 2009, 15:55

Originally Posted by Fumph

That's very interesting thanks. I went and had a look at a couple of internet sites in the states and they appear to be well thought of. The Givi site in Italy doesn't mention the A755 as fitting the GN250 so it is good to know you have fitted it ok. I saw the pics of your GN and it looks fine.I was wondering about your top speed for the GN 137 kph! that is the fastest I have heard anyone doing on one. I have had mine to 120 with a tail wind but 110 is about what I get normally. Have you modded the exhaust/air intake carb etc?I was hoping the faring would give another 10 kph and ease the wind buffeting at 100 kph.
There is an agent for Givi in NZ and I have emailed them for prices etc.

Yes it does ease buffeting at 100 kpm. Creates a calm pocket between you and the fairing.
I haven't done any mods to the bike. It does take a while to get up to top speed of 137 kph and needs a long flat stretch. Front end gets feels pretty light once you get over 125 or so kph. Could be the speedos are only calibrated up to a certain speed and vary from bike to bike.
110 kph is pretty slow top speed for a GN. Maybe it needs a tune up. Not sure if there's been any hp changes over the years.

**Fumph** · 7th February 2009, 21:04

Well yes maybe it does need a tune up I will have to look at that.
Was out this afternoon and on a long straight managed to get up to 122kph before having to ease up for a bend. A site I found today says that in a test in the late eighties 69mph was the top speed for a standard GN250(about 129 kph). The bike is getting faster with age.... when I first got it had 2500 ks and 100kph was max..... but I notice it is getting faster with age now at 6400 ks....When you fitted the faring did you have to move flashers and reflectors?

**NOWOOL** · 7th February 2009, 23:55

Originally Posted by Fumph

Well yes maybe it does need a tune up I will have to look at that.
Was out this afternoon and on a long straight managed to get up to 122kph before having to ease up for a bend. A site I found today says that in a test in the late eighties 69mph was the top speed for a standard GN250(about 129 kph). The bike is getting faster with age.... when I first got it had 2500 ks and 100kph was max..... but I notice it is getting faster with age now at 6400 ks....When you fitted the faring did you have to move flashers and reflectors?

My bike has almost twice the kms, so maybe mine is just "broken in". I'm sure your bike specs are identical to mine.

Nah, I didn't have to do any mods to fit the fairing. it attaches to the headlight mounting bolts and two clamps on the handllebars. I'll take some closeup pics tomorrow and post them for you.