Gday from Taree

Hello. Seasons Greetings. I bought my GRiSO on the 2nd June 2006 from Bikers at Bathurst. He is my fourth Moto Guzzi , my 12th motorcycle Ive owned , he will be the last bike I buy. Interestingly my wife threatened me with divorce if I bought another bike.......Luckily for her I don't want another one. The GRiSO has been a challenge at times,a pin in the ECU failed when he was 1 month old, the outer friction plate in the clutch fell apart at 30 000 Km (poorly riveted,I don't do wheelies ,burnouts or hold the clutch in at lights etc) .Pinging pinging pinging so I wasted good money on a Power Commander,wide band O2 sensor and VDST.fitted a Staintune muffler which didn't do the bike any favours. The 2into 1 piece cracked so it was replaced under warranty. this one cracked as well. I suspected the frame mount was in the wrong spot soI then made 3 mufflers and 2 different 2into1 pieces over the years. At 100 000 Kms I pulled his heads off. There was a dag around the inner plug hole on the right head. I replaced rings, valves and springs and exhaust guides and cleaned up the crap around the valve seats. Ping ping ping.Up till (brand new to 100 000 Kms) now he refused to balance the throttle bodies to my expectations. I had made my 3rd manometer and bought a carbmate,taken the bike to North Coast Vee twins and then later Samples for T/B balance. I followed the procedure for T/B balance and was still not satisfied. So I took him up to Protech at port Macquarie and had him dynotuned. after the head work. Yah hoo 80.5 RWHP ,torque and power curves dip free.....ping. I fitted an Agostini 2into1 and reverse cone muffler and took him back to the dyno. No more ping but fuelly oil.Then I found this forum...... Took the bike down to Pete Ropers and he installed one of marks maps (2230GS08 ?) What an incredible difference.vast improvement overall but now a bit harder to start. So I put my manometer on him and bloody hell I can now balance the T/Bs to my satisfaction.UNBLOODYBELEIVABLE. I am now trying different trims. A work in progress. I thank all involved in the development of Guzzidiag ,nothing short of a Nobell Peace Prize would be enough reward for all concerned. looking forward to a night at the Long Flat pub and a ride with other Grisos. Cheers.

The TB balance thing is weird? Maybe just a result of poor delta fueling resulting in the cylinders working and pumping differently. No idea really, just thinking out loud.

Pete

Pete my thoughts exactly. The modified advance might also help, the bike no longer sounds like its too advanced. Smooth from idle to about 6000 RPM and then he just fucks right off like like hes got a gutful of steroids.

A lot of the 'Sounding like it's too advanced' on a stocker is down to the system trimming the fuel down almost to the point of incombustability!

I have no idea what was done to your ECU by the vendor but if it was anything like the 8V 'Reflash' the answer would be 'Turn the lambda off, add too much fuel and not a lot else'. Turning the lambda off usually cures the lean-ness and makes 'em run rich on the main map. You'd have to ask Mark about other aspects like the delta. What happens after that depends on the PC/AT but if you have an already rich base map, turn the lamda off and add more fuel? Well you can set the target AFR at whatever you like but the AT can only trim a certain amount, (Can't remember what, Mark explained it to me.) and if the target AFR requires the removal or addition of more than that amount the target can never be achieved. If the main map and delta corrections make one or other cylinder blubberingly rich this will be reflected in the exhaust gasses and as hard as the system tries to remove fuel it won't be able to remove enough so the thing will still run rich, hence the bore wash and fuelly oil.

Listening to Tony and Mark discussing this at Lake Conjola was very interesting for a neophyte like myself. There is a lot to learn and understand but as you learn it all begins to make sense. The long and the short of it is that yes, you can use the PC/AT for fine tuning and especially, (I would guess?) if you live somewhere where you experience extremes of temperature or altitude changes but the actual MAP has to be right, or very close to right, for the full benefits to be achieved.

Living where I do the most altitude change I generally experience is about 900 metres from sea level to Bungendore. Where Mark lives is about 600metres above sea level I believe and while I can feel a slight difference in performance between here and the coast the map and its altitude/air pressure correction seems to be perfectly acceptable to me in any circumstance I am likely to experience. For some of the guys in places like Arizona or Colorado this may not be the case. I am at the moment 100% satisfied with how my bike runs and even if I was looking for anything else I would rather not screw around with chopping into looms and adding black boxes. Others may well feel differently though. Vive la differance!

Pete

Welcome to the Ghetto Charlie

Welcome!

Howdy Charlie

Welcome Charles. Good to hear you have sorted some of the issues with your GRiSO and that it is running well for you.

Enjoy the ride etc.. in 2015!

Happy to see you here! Forget the pint you owe me.

Charlie, were you on GT asking about different header lengths effecting T/B balance etc?
Oh, & welcome and see you at Long Flat soon.

Hi Charlie J and welcome.
Great to see you are enjoying the GRiSO.
Rode from Gloucester to Taree along the Bucketts way, man that road has a lot of bumps.

G'day CJ, see you at the LFP next year.