Hi guys, OK u have a 2013 848 sf with 13500 on the clock, belts where done as a desom service in 2020 at 9k miles. Bikes just been on for an mot and service, I asked him to inspect the belts however on collection of the bike he told me he hadn't had time to remove the covers ect and that the belts should be fine...I want happy. Anyway today I removed the cover on the horizontal belt and was surprised by the amount of slack. Can anyone tell me if its normal to have some movement between the pulleys, I'll upload a short video, thanks in advance. Jay
848 SF is on a 5 year/15k belt schedule. You can check your tension using a hz meter or app. For used belts the minimum is 70 and to set them you want 90.
Like some on here, I use the Gates Carbon Drive app on my iPhone. Have had great results over the years and a doddle to use as very DIY friendly.
there is an old trick, 5mm hex should fit between the tensioner pulley and belt. That is equivalent to 110hz, and thats what our engines require... as for longevity of the belts... today's technology is much better then 20 years ago. 15k miles no problem on them. We have guys running the belts over 20k without any issues and if you don't ride much, they are ok for up to 9 or 10 years. Many feel uncomfortable based on the older bikes and what they required back in the day.
5mm key works or worked on the old 900 2V motors, but it’s no where near on the 4V or modern 2V belts. The tensioners are also lipped on 4V, so the key won’t pass through anyhow.
i believe there is another method with the open 8mm spanner, you measure the tension of the belt between the gears and it should be length of the the gap.... cant recall exactly now. I imagine someone knows another method without using Hz. I find it hard to get a proper read out without total silence and even then, i question it
