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      JUST IN!   07/18/2018

      Video: 2019 Yamaha YZ250F Features & Benefits 


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About borgwarner

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  1. Magic button! I would give a lot for a good working starter if I were you.
  2. Thanks! Seems like not too many ride a STIC. I would be very interested, but getting it to Europe would be another issue too probably.
  3. Has anyone tried the STIC on a 200? Would be really helpfull to read some reviews here. @harrperf Do you have data for a 200?
  4. Most likely you have to look at the common possible issues. - First attach your cars battery or similar to your bike and see what it does. Maybe your battery is just on the edge - Check all connectors and where the thick cables are connected to frame, battery and starter. Clean them! - also have a look at the starter relay. If it got dirt inside or worn connectors inside. I've seen this quite often, especially on bikes who see a lot of pressure washing. (I do not know if you can open yours.)
  5. That's the way it is done! Observing all the variables and trying to know which one does what and then doing incremental changes.
  6. This is probably as old as premix exists, but it is not the whole story. Yes if your jetting is wrong, then this could result in spooge, but you can have a perfectly good jetting and still have spooge. So why is this? Because of the temperature where the oil burns. Lets say you have a perfectly right jetted carb and you mix with oil which burns at maybe 250°C and you have a day with a lot of slow riding and your engine just does not get hot. Then you will have spooge just because some of the oil does not get burned. Now lets assume the same as above except you run an oil which burns at 100°C. Same riding which lead to the spooge above, now will result in much less spooge, because the oil will get burned. Of course the ratio plays a role too, just because if there is more of the unburned oil if you mix more in your gas. On the other hand the above also means, that if you run a well jetted carb and mix with oil which burns at low temperatures and now you add more oil to the mixture you will still not see spooge. Now if you would run the engine under heavy load a lot you could still see no spooge, because the oil just gets burned because the engine is hot (like really hot). So then comes another point. The oil takes quite some time to migrate through your engine and exhaust. It is said to take something like 30min under full load! So I assume it will take much longer if ridden like most of us do. In the end there are quite some variables which influence how much spooge you see. I would sugest not to use spooge as an indicator for your jetting. At least not without thinking about the other factors in play.
  7. I am not Ernie, but just because it happended last week.. : A friend of mine had a 300 GasGas (Old screewtop Kehin) he was never able to find a good idle. Now he filed the little notch and hooray very good an stable idle.
  8. I am a tall rider and have tried a couple of different pegs to lower them. When recently I saw a pair of pivot pegz being sold "used" I bought them to try those too. Now I have ridden them for a couple of hours and so far I like them. The difference to normal pegs is not very big to me, so it does not take long to get used to them although the first time you ride them will probably be a little weird. Normal riding, hillclimbs ect I actually feel no difference to normal pegs. The only thing where they stand out for me is in very tight trails with lots of flowing corners. There you can really feel the pegs moving and it feels a little bit like you have more agility in the bike. It's really fun! Except from this pivoting thing, they a very well made and provide very good grip without being so point like some others are. You will have to replace the PTFE bushings at one point probably, but mine are used (80h) and still very good.
  9. Thats it, ktm is not doing for the tolerances, thats also why they are al the same when new.
  10. I do not know or even have a clue why they would do this, but it is so consistent that I think they must have a reason for it at least
  11. That's very unusual IMO. The squish on KTM's is too big being stock, but they are very accurately similar.
  12. These Guys are excellent riders! It's very hard to maintain traction in these conditions let alone to stay balanced. This is frickin steep!
  13. I always like your input here, but I think I do not understand it right know. Some pages earlier you said, that some riders in a Hardenduro event had much better results after switching over to the Starcross 5 in a very muddy race, and know you say you don't think they work? Could you clarify your thought?
  14. I am looking forward to your RK-Tek Head experiences. I always wonder why people want to use less oil? The only reason I can think of is that it is more expensive than gasoline. If the engine is fairly well jetted and kept in higher rpms mostly, then 30:1 is a good choice. If you only ride absolutely crawling pace, then even 60:1 could be appropriate but this is only if you really ride trials. One thing I noticed is, that if your bike is not jetted well it starts to smoke quite a bit if not ridden hard.
  15. Of course what you heard is wrong. It just defies the laws of physics. The think is, that the oil migration is not linear. As far as I understand it, the rpms have the highest influence on the amount of oil transported through the engine. So lets assume you are running 20:1 and you are doing trials like riding. This will lead to some accumulation of oil in the crankcase. Of course it will never fill up. Now when you go and want to ride a fast section with high rpms, you will see some smoke because the accumulated oil will get transported through the engine now and the oil level in your crankcase is sinking. This is of course very dynamic. There was a test in the 1970s I believe with radioactive material added to the oil to see what it actually does in the engine. If I remember it correctly it took the oil about 30min! from one side too the other, so there is a very big amount of lag in the system. That is what I was saying so often and no one believes it. More oil to the ratio works better. A guy I knew some years ago did the same test and got similar results, also saying that more oil than 18:1 will loose power. I did a test myself with different ratios, completely unscientific of course, but I was also surprised by the increase of power. If the sealing on the piston is the reason or something else like better cooling, less friction ect I don't know.