Suzuki DR 750 BIG fuel consumption

[Fred4stroke]

Help me!

I have a 1988 Suzuki DR 750 BIG.  Its fuel consumption is very bad, 11km/L!  Can someone tell me what could be wrong?

[GreenMamba1974]

there is a bloody big hole in your fuel tank 

[Old Baldy]

- REALLY filthy air filter
- Stuck choke/enrichner slide or partially closing slide
- Worn carb needle jet

[Wild Hearted Son]

Hello & welcome to the forum
It is always fantastic to find another DR BIG rider

Apart from the things mentioned above,

My experience with these old things is that if you're running on original carbs - the plastic thingies inside the carbs have worn out & are causing the slides to stick. If you are also having spluttering & bogging then I'm almost convinced that this is the case.

Both DR_BIG_750 & I have had the same problem with ours ( to be expected after 20 + years I suppose ) - He managed to source a set of BMW Funduro carbs & that fixed his problem - I ended up changing my carbs to Keihin ones.

regards
WHS

[Old Baldy]

Dunno what plastic thingie is referred to above, but some Mikuni CV carbs tend to wear their needle jets very quickly (requiring replacement every few years). If the choke/enrichner and air filter are both good, then this is what I'd first tackle.

You can get Mikuni CV rebuild kits pretty cheap through Sudco in the States, if you can get them over to RSA in someone's luggage.

[grego]

You can get Mikuni CV rebuild kits pretty cheap through Sudco in the States, if you can get them over to RSA in someone's luggage.

mcomp.co.za can order stuff from Sudco... email them if you need a carb rebuild kit.

[Wild Hearted Son]

As far as I'm aware the plastic sleeves that wear through are not included in the carb rebuild kits.

my 2c

[Kokkus]

Help me!

I have a 1988 Suzuki DR 750 BIG.  Its fuel consumption is very bad, 11km/L!  Can someone tell me what could be wrong?

Sjo, ek dink jy ry net K@K ou maat...! 
Ek dink ons moet 'n klomp bier koop dan tune ons jou bike een Saterdag...!