I hate to ask , but what the heck. I just bought my second 919(02 w 8900mi) and took it for a 100 mi shakedown run last night and almost didn't make it back home. Conclusion first- plugs 3 & 4 are fouled and wet. I cleaned them up enough to see that yes, they are getting juice and do spark. The previous owner said that he had a little rust in the tank from storage, so he drained it- acid washed it, and replaced the pump(&everything in the tank). He said he cleaned the injectors as well. The ride started fine but it did smell a little rich. The further I rode the more it began to surge and feel weak on low end. By mile 70 (well on my way back home) it was was sputtering and surging quite a bit, and stalled at a light or two if I didn't keep the rpms up. No hoses or vacuum lines were pinched under the tank... my conclusion is clogged injectors (2&3).. if so, are they a serviceable part or do they get replaced? what say ye forum dwellers? Thanks!