I realised a few days ago that the service on my Guzzi that I was praising a couple of weeks ago perhaps wasn't as good value as I had initially thought. Looking through the invoice it basically looks like they just replaced the engine oil and filter, did some basic checks, checked the dianostics and that was about it.
Since then I've replaced the transmission oil, the gear box oil, replaced various fixings that were looking a bit crappy, and replaced the engine sump bolt and washer (because it was leaking after the service
).
Then today before my trip away, I swapped the air filter for a K&N replacement and fitted new spark plugs. When I removed the old filter there was a load of gunk in the airbox, I sucked nearly 250cc of the crap out in a syringe
and then cleaned everything before fitting the new filter. The Guzzi workshop manual states that the plug gap should be between 0.6mm and 0.7mm, both the new plugs and the old ones had a gap of at least 0.85mm
so initially I had planned to set the gap to 0.65mm but opted for 0.7mm. I'm assuming that when the plugs were last changed they were probably just fitted straight out the box without being checked.
Should I be concerned about the amount of crap in the airbox? (other than it obviously must have taken some time to accumulate and the bike has been serviced twice in the last few months) - And would there be any reason for intentionally setting a larger spark plug gap?
Took the bike for a test ride and it seems to be running great
Makes you realise that a reasonably competent home mechanic is probably likely to take more care with their bike and look after the basics better than a dealer.