Join Date: Oct 2019
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Cam chain tensioner/Valve issues 2013 Triumph STR
Hi all, 3 months ago I bought my 2013 Street Triple R, and I have noticed that it may have some issues and was hoping somebody could help me resolve the issue, as I really don't want to shell out a ridiculous amount of money for a diagnosis and repair from a dealership.
I bought the bike with 6800 miles on it, and since have put about 2,500 miles on it.
About a month and half or so in to owning the bike, I noticed a strange rattling noise. It was very subtle but there. I kind of just assumed it was a normal engine noise, so I ignored it for a while. Eventually I got a little worried, looked it up and most people pointed at the cam chain tensioner.
I got a lot of mixed answers from different forums about the rpms the rattling was most prevalent and if it went away once the bike was warmed up. My bike rattles in all gears including neutral, and mainly at idle and low RPM's. It seems to go away around 5k RPM, but that could just be the engine drowning it out. The rattling noise isn't extremely loud, and seems to be coming from the upper part of the engine.
The other day I rode to a relatives house, an hour and a half away. On the way there everything was fine, but on the way back I noticed about halfway through that it seemed like I was losing power. Revving up to 6k RPM seemed fine but after that it vibrated a lot and didn't seem to accelerate very fast. This happened in every gear except 6th, I was going 85 on the interstate in 6th gear and didn't have the issue. It felt like I was redlining at 8k RPM in every other gear.
This is a minor thing but when approaching a stop light in sixth gear I was distracted and pulled the clutch in and braked fairly close to the light. When I stopped and tried to downshift the lever didnt work the first 2-3 tries and really freaked me out.
The last big thing I noticed is that I am supposed to be getting 40-60 MPG with this bike, but the MPG indicator has shown 30-35 MPG since I bought the bike.
I am worried that something may have caused a valve to get burnt or bent, which could explain the low gas mileage and loss of power. I don't know if the cam chain tensioner failing could have had something to do with that.
I've also heard that the valves themselves could make a rattling noise if the clearance was too large, but it doesn't seem like valve clearance issues are very common on this bike, especially at the mileage I am at.