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peterb

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  1. AlexR

    AlexR    peterb

    Hello, I noticed you responded to a post regarding a smoky Osssa. In this post, you mentioned that a diagram was a later year with a race type LH bearing and that the oil feed holes on those models were blocked off. I have a 2015 280 that started smoking intermittently after I repaired the gear box. I assumed it was the LH seals but your post makes think otherwise...do you know if the LH seals would cause smokiness (intermittent) in a 2015 280?

    Thanks,

     

    Alex

    1. peterb

      peterb

      Hi Alex, would you be ok to email me, I find the message service quickly fills up on TC and I have to delete a few things to allow more entries. Pls try me on peterboettchernz@yahoo.co.nz

      If you were in NZ I would offer to reset your software and there is a straight forward tune to lean or richen the mixture over the rev range.

      Due to the backward facing cylinder, there is a step at the base of the crankcase mouth where 2T oil builds up with use. When starting from cold, this oily residue mixes with the combustion fuel/air until it is all burned off, then after use again, the build up returns. Is this what you are seeing? Very rich from cold for a long time? Bye, Peter.

      Just remembered, there is another Ossa rider in Canada who has a cable set, will see if I can think of who it is. What city are you close to?

    2. (See 5 other replies to this status update)

  2. AlexR

    AlexR    peterb

    Hello, I noticed you responded to a post regarding a smoky Osssa. In this post, you mentioned that a diagram was a later year with a race type LH bearing and that the oil feed holes on those models were blocked off. I have a 2015 280 that started smoking intermittently after I repaired the gear box. I assumed it was the LH seals but your post makes think otherwise...do you know if the LH seals would cause smokiness (intermittent) in a 2015 280?

    Thanks,

     

    Alex

    1. peterb

      peterb

      The Ossa's were all supplied to us here in NZ running too rich, so we always had to lean off the mixture. You can use a hotter plug, a number 4 heat range always worked well for trials riding. Intermittent is a bit odd, but may well be the mixture too rich. You need to find someone with a cable and software set for your later model ECU, where abouts are you?

    2. (See 5 other replies to this status update)

  3. AlexR

    AlexR    peterb

    Hello, I noticed you responded to a post regarding a smoky Osssa. In this post, you mentioned that a diagram was a later year with a race type LH bearing and that the oil feed holes on those models were blocked off. I have a 2015 280 that started smoking intermittently after I repaired the gear box. I assumed it was the LH seals but your post makes think otherwise...do you know if the LH seals would cause smokiness (intermittent) in a 2015 280?

    Thanks,

     

    Alex

    1. peterb

      peterb

      Hello Alex, with the later design crankcase that you have (2015) the oil ways are not drilled. The LHS crankshaft has two oil seals to prevent drawing in air. There should be no oil in this area. If the LHS seals had failed then you would be drawing in excess air into the crankcase. What colour is the smoke? Blue is gearbox or excess oil in the fuel oil, white would be coolant. Early 2015 Ossa's were supplied with an incorrectly specified RHS oil seal that did not last long, this would allow gearbox oil to enter the crankcase. A bit more info on the symptoms would help ID the problem. Bye, Peter.

    2. (See 5 other replies to this status update)

  
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