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Photo by Marc Gibaud, Clouds on Tres Cerros and Mount Fitzroy, Argentinian Patagonia

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Photo by Marc Gibaud,
Clouds on Tres Cerros and
Mount Fitzroy, Argentinian Patagonia



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  #1  
Old 16 Feb 2017
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Quote:
Originally Posted by Warin View Post
Turn off the fuel .. and then let the engine run - pulls most of the fuel out of the jets.

This responce is to teevee and is prevent blocked jets ... not to fix the original problem!!!!!!!!!!!!!!!!!!!!!!!
been there done that and still got gunked. even ran it dead then drained float bowl using screw. seems as though the utterly horrific gas we have in nicaragua will kill just about anything that sits. it's gotten worse over the past several years as fuel quality has worsened.

since ethanol seems to be the culprit to a large extent, what i'm going to try this year is making up a few gallon batch of de-ethanoled fuel and run that through the system for storing after draining the pump gas from the last trip.
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  #2  
Old 16 Feb 2017
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Quote:
Originally Posted by teevee View Post
since ethanol seems to be the culprit to a large extent,
At least some of the lawnmowers around here stipulate that ethanol based fuels are not to be used ...
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  #3  
Old 19 Feb 2017
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Glad you got the DR running again, sounds like an ethanol problem - its horrible stuff, I avoid using any fuel with it, in every petrol engine I own - if I have to use it and let the bike sit for any more than a few days then I use a fuel stabiliser (Sea Foam) which seems to help reduce crap building up in the carb.

Take that small white filter from the carb inlet and throw it in the bin, they have a tiny surface area and clog up quickly, instead use a proper inline fuel filter, they have 10x the surface area to filter the fuel and last a lot longer before having to clean them (backflush)

As for the decal popping on overrun, the DR is renowned for it, what setup do you have on the carb/airbox? its hard to tune it out with a performance can like the Barratt - or even the GSXR 1000 can, the only real way is to increase fuel flow, which will take the edge off it, but not much, if you do try that, increase the fuel in small stages and compare fuel consumption, but the fuel screw should not be out more ~2.5 turns.

Best way to clean the carb is to strip it down, remove all plastic and o rings and immerse it in Pine Sol for about 3 hours, this removes any varnish/gunk build-up.
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