Hi Ladies and Gents
I'm new on the forum here, but have been researching this topic on the site for the last few months.
I have a f800st 2008. 24,000km (15,000miles). I bought the bike second hand from a classified ad about 3 months ago. The guy didn't ride it often so I got it for a good price.
The problem is that from day 1, the bike has had the cutting out problem where it can't idle at low revs and just cuts for no apparent reason, even when you're on a highway doing 120km / hour and drop the revs down.
This problem only happens when the bike has been running hard for 40mins - 2 hours.
When its cold, or for the first part of a ride, it rides beautifully, no problems at all.
The local dealer (Lyndhurst BWM, Johannesburg South Africa) has had the bike 6 times now and is basically stumped for answers. The various things they've "fixed" already are:
1. First they said it was common, and the throttle valve needed to be calibrated. This they did.
2. The battery died, as it had not been ridden much in the previous 6 months, which I replaced with a new battery.
3. The dealer claimed that the throttle valve was now broken (not just needing calbiration) and needed to be replaced. This they did.
4. Around this time I found info on the forums about the breather hoses being the culprits. The dealer refuted this as "a campaign to fix this problem had already been done" by rerouting the breather hoses to avoid them overheating and kinking.
5. The dealer opened a puma report for the National dealership to advise as they had no other options. The Response came back from head office that it could be the breather hoses.
6. Yesterday, I got the bike back after they put new breather hoses in (which apparently are the latest one's), and last night the bike gave the same problem.
I ride between 20mins and 40mins everyday, with at least 1 or 2 longer rides per week, This is my primary and only form of transport, so I NEED my bike.
I am out of options and would love some input from you all. You're my last hope!
Some more info:
The bike does not cut out when shifting, but does cut out when the revs drop below about 3000rpm and the bike is hot. Its not 100% consistent, sometimes I ride for 2 hours without problems, sometimes it kicks in at 30 minutes. Normally, the harder I ride it (stop, start, quick acceleration) the quicker the problem appears. It happens in all gears and once its happening, I can even sometimes replicate the problem in neutral with the bike just idling on the stand. To me, it sounds like the bike is not getting enough petrol in the engine and cuts out much like my old scrambler use to do when the petrol was not switched on properly. Also, I think it may happen more often when the fan kicks in? Im not 100% sure but yesterday, I was sitting at a stop street, a noise kicked in which sounded like a fan and then the bike immediately gave this problem.
The Bike is not under warranty, so all of the above have cost me out of my own pocket.
Sorry for making this post so long, but I thought I'd include as much as possible to not waste anyone's time.
I'm new on the forum here, but have been researching this topic on the site for the last few months.
I have a f800st 2008. 24,000km (15,000miles). I bought the bike second hand from a classified ad about 3 months ago. The guy didn't ride it often so I got it for a good price.
The problem is that from day 1, the bike has had the cutting out problem where it can't idle at low revs and just cuts for no apparent reason, even when you're on a highway doing 120km / hour and drop the revs down.
This problem only happens when the bike has been running hard for 40mins - 2 hours.
When its cold, or for the first part of a ride, it rides beautifully, no problems at all.
The local dealer (Lyndhurst BWM, Johannesburg South Africa) has had the bike 6 times now and is basically stumped for answers. The various things they've "fixed" already are:
1. First they said it was common, and the throttle valve needed to be calibrated. This they did.
2. The battery died, as it had not been ridden much in the previous 6 months, which I replaced with a new battery.
3. The dealer claimed that the throttle valve was now broken (not just needing calbiration) and needed to be replaced. This they did.
4. Around this time I found info on the forums about the breather hoses being the culprits. The dealer refuted this as "a campaign to fix this problem had already been done" by rerouting the breather hoses to avoid them overheating and kinking.
5. The dealer opened a puma report for the National dealership to advise as they had no other options. The Response came back from head office that it could be the breather hoses.
6. Yesterday, I got the bike back after they put new breather hoses in (which apparently are the latest one's), and last night the bike gave the same problem.
I ride between 20mins and 40mins everyday, with at least 1 or 2 longer rides per week, This is my primary and only form of transport, so I NEED my bike.
I am out of options and would love some input from you all. You're my last hope!
Some more info:
The bike does not cut out when shifting, but does cut out when the revs drop below about 3000rpm and the bike is hot. Its not 100% consistent, sometimes I ride for 2 hours without problems, sometimes it kicks in at 30 minutes. Normally, the harder I ride it (stop, start, quick acceleration) the quicker the problem appears. It happens in all gears and once its happening, I can even sometimes replicate the problem in neutral with the bike just idling on the stand. To me, it sounds like the bike is not getting enough petrol in the engine and cuts out much like my old scrambler use to do when the petrol was not switched on properly. Also, I think it may happen more often when the fan kicks in? Im not 100% sure but yesterday, I was sitting at a stop street, a noise kicked in which sounded like a fan and then the bike immediately gave this problem.
The Bike is not under warranty, so all of the above have cost me out of my own pocket.
Sorry for making this post so long, but I thought I'd include as much as possible to not waste anyone's time.