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And now 5l/100 if constantly ridden in fuel saving modus. Its obvious that something isnt right, and thats with your bike too. A carburated Dr650 has 25 % less fuel consumption, a new V-Strom has 25-40 % less fuel consumption, a BWW 650 GS with rotax engine the same as the V-Strom. I could go on until we both fall asleep of boredom. 5l/100 kms on a fuel injected bike ridden moderately is faaar too much. My dads 1400 kilo 125 HP car uses less fuel than my Tenere....dohdohdoh My Ten is a 2011 for sure. So then I can stop thinking about the oil drenage problem I hope.... |
Hello
The above written 4.75-5.5 l/100km is what I remember by simple calculating in the head at the gas Station. Just had a look at my statistic of my RTW. I wrote everything in a excell, but only xx.x Liter, so there is a statistic error, in reality it's higher than that: 104150km 4.55l/100km Big brother has more data: https://www.spritmonitor.de/de/ueber...30&powerunit=2 sushi |
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3.xx gets my nc750x parallel twin and not always... Yamaha XT660Z Tenere MPG - Actual MPG from 65 Yamaha XT660Z Tenere owners BTW is it your first bike? p.s. Dude, and you really think that RTW trip tests the bike reliability the most and makes you more important ??? Number of steady, empty kilometers accumulated ??? I can as well put bike on stand in my garage and make it run all night. :rofl::rofl::rofl: :funmeteryes: |
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I have had 9 bikes alltogether. And I have rented many different models to try them/test them. I have been on organised bike tours with different models and I have borrowed friends bikes - so I have experience on around 20 different models. Yes of course a RTW trip or a long overland trip is the ultimate test for a bikes quality. Because that let the bike be tested with under all kinds of climates, all kinds of road conditions etc etc often loaded up with gear and equipement. Actualky that goes without saying. This forum is actually intended for overlanding and RTW-trippers. Im sure there are a forum that suit weekend riders like you somewhere out there... |
Yes, but did he specifically replace the valves, guides and guide seals??? Sounds , like he lapped the valves in to me, possibly re-cut the seats, which implies he reused the valves. Even if he put new valves in , did he replace the guides???
I do suspect new valves, guides and seals would solve your oil problem and possibly your fuel mileage problem as well, although it isn't actually that bad at 55 mpg imperial. Quote:
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About fuel milage - you must consider Im riding maximum 80-90 kms/h, and sometimes far slower than that. Average out on 65-70 km/h I suspect. |
But thanks for the advise, I will definetively investigate about the top and valve job...
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To return back to the original topic.... How many miles/KM have those bikes? When I buy a bike I count KM x years. A single cylinder bike has payed its dues after 100'000km or 10 years. Past that point you have to put money into the bike. No problem if you are a skilled mechanic but expensiv if not. For RTW I'd advise to buy as new and few KM as you can affort. Repairs on the way are not only expensive but most important not easy since "our" bikes are not common, not ridden by the average population, mostly by "the rich". So, I'd calculate the length and time of your RTW and add this to the bike you'd like to buy. Since I only had japanese bikes and remember every bad story of a non japanese bike I hear, I'd take only a japanese bike. have fun sushi |
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Be sure the oil is being burned, not leaked. Finally, while it is apart, it would be worth pulling the cylinder to make sure there are no silly mistakes - a common one is not gapping the piston rings properly or fitting the oil scraper ring upside down. Does it need a cam-chain while you are in there? Good luck with it man - let us know how you get on. Kind regards, Sean |
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There are no visible oil leaks so I do think oil is burned. When I throttle up the bike while parked to 4-5 000 rpm I can see that exhaust is black. Btw - exactly as it was before. The piston rings - well I was present when the old cylinder was pulled off and then the mech showed me that the two uppermost rings had the opening on the same place. Thus I do think he put new new rings on the correct way including the oil scraper ring. Although 100 % sure I cannot be. It did get a new camchain on the first rebuild, some 15-16 k kms ago. I wouldnt think thats needed now. |
I agree, won't need a new cam chain.
Worth considering other causes for high fuel consumption and black exhausts - is the mixture too rich? Last air filter change? For the oil burning, I would ask the previous mechanics if they did the valve guides and seals before tearing into it. The piston rings should not have the gaps aligned, rather be opposite sides of the piston.... Touring Ted on this forum is an experienced and very knowledgeable bike mechanic - it would be worth soliciting his thoughts as well before take down. Quote:
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Black exhaust smoke presumably
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Burning oil results in blue exhaust smoke. |
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Kev mod is turned to zero and have been so for a long time. Is there any other way to adjust air/mixture without altering ECU etc? |
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But honestly, 55 mpg from a loaded and modded bike is not bad.... |
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