A note of caution here in replacing the rubber vacuum tubing that runs from the MAP sensor to each throttle body. Several have reported the short lengths of tubing getting brittle and cracking causing vacuum leaks and poor running. They have replaced it with either generic vacuum tubing or perhaps the official BRP part. I just had that problem to a minor extent in that I was getting intermittent P0174 codes (#2 cylinder running lean). It was finally diagnosed as a loose connection where one of those rubber tubes fits onto the MAP sensor. The tubing hadn't cracked, it felt flexible and the bike ran fine but threw the code. Must have dried out just enough to not be tight on the fitting.
Now here's the caution. In reading the fine print of the shop manual, I discovered that BRP says these two rubber tubes are of a "calibrated" length and "should not be tampered with". If the length is not as prescribed "the engine may be improperly calibrated". Hmmm... Anyone using generic rubber tubing should be sure they make the lengths exactly the same as what they remove. The manual shows it as 85mm or 3.34" (the manual incorrectly shows the conversion as 4.33"). I measured mine at about 85mm. If I hadn't read that warning in the manual, I might have bought some tubing and just cut it to a convenient length that makes for a nice easy connection.
I mentioned this to Scotty and he had a further question: if the inner diameter were slightly different,would that also cause an error? You could buy tubing that fit well and felt tight but if it were slightly different (say English size versus metric size), would that make a difference?
I don't know if the BRP tubing is a higher quality that holds up better to the high temps in that area. It obviously doesn't last forever (30K miles in my case) but maybe generic vacuum tubing would fail even quicker. No idea.
Now here's the caution. In reading the fine print of the shop manual, I discovered that BRP says these two rubber tubes are of a "calibrated" length and "should not be tampered with". If the length is not as prescribed "the engine may be improperly calibrated". Hmmm... Anyone using generic rubber tubing should be sure they make the lengths exactly the same as what they remove. The manual shows it as 85mm or 3.34" (the manual incorrectly shows the conversion as 4.33"). I measured mine at about 85mm. If I hadn't read that warning in the manual, I might have bought some tubing and just cut it to a convenient length that makes for a nice easy connection.
I mentioned this to Scotty and he had a further question: if the inner diameter were slightly different,would that also cause an error? You could buy tubing that fit well and felt tight but if it were slightly different (say English size versus metric size), would that make a difference?
I don't know if the BRP tubing is a higher quality that holds up better to the high temps in that area. It obviously doesn't last forever (30K miles in my case) but maybe generic vacuum tubing would fail even quicker. No idea.
