I'm looking at the Griso 8V and test rode one for a few miles. The bike only had about 10 miles on the clock, but it felt and sounded like it was running strong. I felt a lot of vibration throughout the rev range and was surprised. I currently ride a BMW K1200S, but had 2 Ducati's before that and still ride friend's Ducatis occasionally. The Ducati is lumpy down low and has some buzz above 5-6000 rpm, but has a mid-range very smooth spot. I was very surprised that I did not find this on the Griso. Is this a characteristic of the Guzzi engine or was the one I rode perhaps not sorted correctly? I'm looking forward to getting back to a V-twin, but did not expect a very healthy amount of vibration at every engine speed. Thanks for your inputs.
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Moto Guzzi 8V engine vibration
- Thread starter TRw1
- Start date
I can't speak for the new Griso 8v. I have an 07 Griso 1100 4v. My bike is a little vibey in a couple places below 4K (3200 and 3600rpm I'm guessing here) but everything above 4k is smooth. The sweet spot for cruising is between 4-5K. My guess is the 8v you test rode has not been set up properly. And they do smooth out with miles. I wouldn't count it out just yet. I'm sure others on this forum will have some good input for you. Good luck!
Penis Rotor
GT Godfather!
Vibration? now, there is a subject we could go on about for hours!
OK, the 8V in stock trim DOES vibrate more than the 4V. The main reason for this, (Apart from poor set up. Any bike that is poorly set up is bound to vibrate more!) is the fact that at certain points it is critically lean, this is especially true of the closed loop portion of its mapping.
First thing is to get the TPS checked and the throttle bodies ballanced as well as ensuring the tappets are set correctly.
Second thing is to make sure the #2 map is installed. This does help significantly.
After that there are a number of options from the cheap and cheerful like the 'Fat Duc' O2 manipulator which while apparently was a bit of a disaster for Todd on the Dyno actually has made a significant difference to the closed loop running on my 8V and has smoothed out both vbes and the throttle response at small throttle openings with no downside apart from a rather odd sensitivity to ambient air temperature. Right the way through to full map modifier kits and ECU re-flashing as Todd is offering with the PCV & auto-tune package or Rapidbike are claiming to offer with their system. FWIW I have both on order and will be experimenting with both over the next few months. Rapidbike have been pissing me about though and while I'm still currently giving them the benefit of the doubt it seems that their system is under-develped so far and i've been told another two weeks is the time prior to shipping....... Hmmmmmm!
As a generalization though you'll never get a great, big, antedeluvian, air/oil cooled ditchpump to be as smooth as a modern liquid cooled DOHC twin. There are a host of reasons for this all stemming from design factors. Call it 'Character' or simply obsolete design but it does mean that a Guzzi IS 'Different' and won't feel like a Japanese multi or even modern watercooled twin, (My Aprilia Mana is positively bland by comparison with my Griso, but I know which one I prefer!!!!!
). Theya ren't for everyone and if you find *any* vibration too much then it won't be the bike for you.
If, OTOH you like something that shakes and shudders like something from the dawn of the industrial revolution, roars and rumbles like a *real* motorbike of yore but still has the fun factor to gobble up horizon at a modern enough rate, has killer looks and won't be seen with a dozen others just like it every time you park up it really is a spectacular great lump!!!!
It even does dirt quite welll!!!!!! :mrgreen:
Pete
OK, the 8V in stock trim DOES vibrate more than the 4V. The main reason for this, (Apart from poor set up. Any bike that is poorly set up is bound to vibrate more!) is the fact that at certain points it is critically lean, this is especially true of the closed loop portion of its mapping.
First thing is to get the TPS checked and the throttle bodies ballanced as well as ensuring the tappets are set correctly.
Second thing is to make sure the #2 map is installed. This does help significantly.
After that there are a number of options from the cheap and cheerful like the 'Fat Duc' O2 manipulator which while apparently was a bit of a disaster for Todd on the Dyno actually has made a significant difference to the closed loop running on my 8V and has smoothed out both vbes and the throttle response at small throttle openings with no downside apart from a rather odd sensitivity to ambient air temperature. Right the way through to full map modifier kits and ECU re-flashing as Todd is offering with the PCV & auto-tune package or Rapidbike are claiming to offer with their system. FWIW I have both on order and will be experimenting with both over the next few months. Rapidbike have been pissing me about though and while I'm still currently giving them the benefit of the doubt it seems that their system is under-develped so far and i've been told another two weeks is the time prior to shipping....... Hmmmmmm!
As a generalization though you'll never get a great, big, antedeluvian, air/oil cooled ditchpump to be as smooth as a modern liquid cooled DOHC twin. There are a host of reasons for this all stemming from design factors. Call it 'Character' or simply obsolete design but it does mean that a Guzzi IS 'Different' and won't feel like a Japanese multi or even modern watercooled twin, (My Aprilia Mana is positively bland by comparison with my Griso, but I know which one I prefer!!!!!
). Theya ren't for everyone and if you find *any* vibration too much then it won't be the bike for you.If, OTOH you like something that shakes and shudders like something from the dawn of the industrial revolution, roars and rumbles like a *real* motorbike of yore but still has the fun factor to gobble up horizon at a modern enough rate, has killer looks and won't be seen with a dozen others just like it every time you park up it really is a spectacular great lump!!!!
It even does dirt quite welll!!!!!! :mrgreen:
Pete
I have recently bought a 8V Stelvio, after riding a number of Harley's. The Stelvio is by far a more uncomfortable ride. really disappointed think the Guzzi looks great, but vibration is awful.
Is there a simple solution without having engine remapping, you should be able to buy bike from the dealer running at its best. Any ideas apart from swap for a BMW GS.
Dave
Is there a simple solution without having engine remapping, you should be able to buy bike from the dealer running at its best. Any ideas apart from swap for a BMW GS.
Dave
Penis Rotor
GT Godfather!
It shouldn't vibrate really badly, its simply that it isn't anodyne and bland like so many modern motorbikes. First step would be to get the throttle bodies ballanced correctly and the TPS re-set. A depressingly large number of 'Technicians' don't seem to know how to do this so take the bike to someone who does.
Essentially though. Guages on. Air bleeds closed. Ballance at 3-4,000RPM using the screw on the bell crank under the LH throttle body. Let throttle return to idle. Open air bleed on whichever side has the higher manifold vacuum to get idle ballance spot on. Then reset TPS.
Of course that is assuming that the bike has been serviced properly and the valve clearances are right. Check also that the spark plug boots are in good condition and not arcing to earth. Better yet piss 'em off and fit some NGK SB05E's.
Pete
Essentially though. Guages on. Air bleeds closed. Ballance at 3-4,000RPM using the screw on the bell crank under the LH throttle body. Let throttle return to idle. Open air bleed on whichever side has the higher manifold vacuum to get idle ballance spot on. Then reset TPS.
Of course that is assuming that the bike has been serviced properly and the valve clearances are right. Check also that the spark plug boots are in good condition and not arcing to earth. Better yet piss 'em off and fit some NGK SB05E's.
Pete
dave007 said:
There's more to setup than putting the key in and saying, "There ya go." Unfortunately, many Guzzi "dealers" are of the there ya go mentality, and don't have a clue about proper setup. The 8 valve is as smooth or smoother than any Harley I've ridden..
Hi,
I've been riding Harley for the last 20 years, both Evo engines.
The first straight in the frame, the second (the one I have for nearly 19 years now) is rubbermounted.
My Griso 1200 is riding with less vibrations as my Harley.
He's letting you feel that there is a 1200 cc V-twin working below you, "He's talking to you... :mrgreen: ".
And if you like a (maybe) less vibration machine, probably easyer to ride, maybe even a better build bike..
It's possible a better choice to buy a BMW
hmy: .
Than you can join the club of thousends, ride what the rest rides.
Ride your Guzzi, (nearly) everybody looks back...
They are jealous about you, you were allowed to buy thát bike from your wife :whistle:
Enjoy life.
Ad B
That's strange, in my opinion...dave007 said:
I've been riding Harley for the last 20 years, both Evo engines.
The first straight in the frame, the second (the one I have for nearly 19 years now) is rubbermounted.
My Griso 1200 is riding with less vibrations as my Harley.
He's letting you feel that there is a 1200 cc V-twin working below you, "He's talking to you... :mrgreen: ".
And if you like a (maybe) less vibration machine, probably easyer to ride, maybe even a better build bike..
It's possible a better choice to buy a BMW
hmy: .Than you can join the club of thousends, ride what the rest rides.
Ride your Guzzi, (nearly) everybody looks back...
They are jealous about you, you were allowed to buy thát bike from your wife :whistle:
Enjoy life.
Ad B
mickyvee_2010
Tuned and Synch'ed
Vibration is totally subjective. If you jump off a 6 cylinder Gold Wing and get on a Guzzi, it'll feel like a jackhammer. If you jump off a Norton Atlas onto a Guzzi, it'll feel like a magic carpet. My 8v Griso isn't as smooth as my MkV LeMans was, but it is a whole lot more powerful, and that is a small price to pay, IMO. In my long Guzzi experience, they most definitely get smoother with more mileage. When I test rode a new Stelvio, I found it wonderfully smooth.......................but then, I'd just jumped off my Falcone!!!!!!!