scorpatic Posted October 20, 2013 Report Share Posted October 20, 2013 My OSSA 280i is close to 100 hours up after two years, which is not high usage. I change the oil religiously and keep the bike in primo order but I do notice that there's a very weird low rumbly whine coming from the left side of the crankcase when under load in taller gears. This is disconcerting and I'd like to know if its fixable? It is not present all the time but most noticeable when the torque is loaded, perhaps its the lower e=rev range which enables me to hear it, or perhaps it disappears at higher revs, Any thoughts? Quote Link to comment Share on other sites More sharing options...
lotus54 Posted October 20, 2013 Report Share Posted October 20, 2013 If it is In the gearbox/clutch, they look to be really easy to pull. Pull the whole cassette and check all the bearings. They have made a few upgrades on the transmission, but I don't know what they did. Still under warranty? Quote Link to comment Share on other sites More sharing options...
scorpatic Posted December 21, 2013 Author Report Share Posted December 21, 2013 Peter Boettcher, the importer and a bit of an engineering genius, has found a way to fix the issue. Its quite a modification with the replacement of a teflon coated bearing way deep inside the gearbox. His fix has been made out of delrin and is fantastic. Noise stopped, and I seem to have more torque as well. I recently rode an enduro route with the Waitemata MCC and there was no way enduros were going to pass me on hills and steep sections. Certainly I would pull over and let them pass but the Ossa pulled like a schoolboy up those slopes. Happy. Quote Link to comment Share on other sites More sharing options...
baldilocks Posted December 22, 2013 Report Share Posted December 22, 2013 Can you get him a job at the factory ? From the 1st release of pictures I thought the bike looked fantastic but I cant bring myself to spend that much money on an unreliable bike. When its sorted ill have one. 1 Quote Link to comment Share on other sites More sharing options...
picktas Posted January 13, 2014 Report Share Posted January 13, 2014 Hi - I have a 2013 Ossa that from new, has had a whirring noise in 2nd gear. It is audible whether the clutch is in or out or if the bike is moving or not. The local dealer has had the gearbox out and there are no obvious worn gears or bearings. We put it back together thinking it may improve with time.... Anyone experienced this noise and got a solution? Or got any ideas what could be causing it. Quote Link to comment Share on other sites More sharing options...
sdeane01 Posted January 15, 2014 Report Share Posted January 15, 2014 When mine was making noise i changed the clutch plates and the noise went away. The plates were quite worn and from my experience the plates on the ossa don't last anywhere near as long as my sherco. Quote Link to comment Share on other sites More sharing options...
trialtrial Posted January 16, 2014 Report Share Posted January 16, 2014 (edited) I have a 2012 explorer with about 6 hours on it. It does have a noticeable whirring when in gear, but other OSSAs have it too, so I am not too worried about it. I have already had the tranny out (to fix a user related issue) and it is dead easy to pull out and put back together. There are a few things to watch for, but its really very easy compared to other bikes. There are some PDFs on the OSSAUSA and OSSAUK web sites that have all the information. However the instructions do not have removal of the "clutch fixer nut", which was stock on the explorers and an add on some TR280s. This needs to be removed along with the tranny bolts before the tranny will pop out. So what importer is Peter Boettcher with? I am interested in his modification. I like working in the shop as much as I like riding... Edited January 16, 2014 by trialtrial Quote Link to comment Share on other sites More sharing options...
tony27 Posted January 16, 2014 Report Share Posted January 16, 2014 So what importer is Peter Boettcher with? I am interested in his modification. I like working in the shop as much as I like riding... Peter Boettcher is half the NZ importing team & is on here from time to time Quote Link to comment Share on other sites More sharing options...
trialtrial Posted January 16, 2014 Report Share Posted January 16, 2014 I dont suppose you have an email address for them? All I could find was http://www.spanishtrial.co.nz - only a phone number, not an email address. Quote Link to comment Share on other sites More sharing options...
steveo Posted January 16, 2014 Report Share Posted January 16, 2014 You could send him a PM through this forum, peterb Quote Link to comment Share on other sites More sharing options...
trialtrial Posted January 17, 2014 Report Share Posted January 17, 2014 Great - thanks! Quote Link to comment Share on other sites More sharing options...
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