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sidrat
Sfregiato
Sfregiato


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Join date : 2014-09-22
Age : 56

PostSubject: Engine Noise   Wed Jul 22, 2015 12:29 am

Its all subjective i know, but the bike best bike i have ever owned for engine noise when sat on it, was a Ducati S4rs Monster, the one with the 150bhp 998 motor in it. When you got to the last 750 revs before the red line, it was like a machine gun going off, fantastic! I had owned the Ducati S4r previously and that didn't make the same noise.

Yesterday on a bimble to work, i opened up GRiSO, as you do, to the red line in the middle three gears and the sound is fantastic too, the noise from the exhaust falls away, the rumble disappears and a very serious noise, not unlike the Ducati makes itself known before you have to change up. I always look at the GRiSO as a low tech engine, being aircooled and didn't expect such a sophisticated highly tuned sound. It maybe that it is now starting to run in at 8,000 miles or I have in the past concentrated more on where i was going!!, but it is a great noise.

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beetle
GRiSO
GRiSO


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Join date : 2013-09-30

PostSubject: Re: Engine Noise   Wed Jul 22, 2015 3:08 pm

Maybe not so much 'a sophisticated highly tuned sound', but a more 'raw and visceral noise'.
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Josh.C
Grignapoco
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Posts : 127
Join date : 2015-04-17
Age : 33

PostSubject: Re: Engine Noise   Wed Jul 22, 2015 10:31 pm

My brother has the S4R, which I really like and could have ended up with instead of the GRiSO. I really like the tricolore version of the S4RS too.

But I have no regrets.
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waterbottle
GRiSO
GRiSO


Posts : 1037
Join date : 2015-02-02
Age : 55

PostSubject: Re: Engine Noise   Thu Jul 23, 2015 1:02 am

Arn't dactari's still chain drive ?    Rolling Eyes  ( Easy .... just taking the piss    Laughing )
Edit: I do have friends with Duck-a-ty's
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Pete Roper
GRiSO
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Age : 59

PostSubject: Re: Engine Noise   Mon Jul 27, 2015 6:21 pm

Well, I found out what was causing my great chunk of shit to be so noisy.

The RH big end shells are toast. At first I thought it was big end as it was very similar to the noise that Mark S's bike was making but then as I was preparing to rip into the sump I found that the RH exhaust pipe stud on the head had snapped off!

So, getting that fixed I thought 'Maybe it was just the pipe knocking in the head?' Thankfully I took my own councel and persevered. Popped off the rod cap and the bottom shell was OK. Top one fell out of the rod and is toast. Given how little material had to be removed when Mark's rods were closed and ground I'm going to just slip in a new set of shells and hope that cures it. I also found a bit of gasket missing from around the oil pick-up gallery between the spacer and crankcase. Now I've had the sump off before but never the spacer so it must of been missing ex-factory! Grrrrrrrr! Goes to show how bloody tough they are though! 88,750 km of thrashing with the oil pump sucking air and only now the big ends cry 'Uncle'.

They may not build 'em particularly well in Mandello but jeez they make 'em tough! Probably just as well! Very Happy

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Pete
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1151
Sfregiato
Sfregiato


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PostSubject: Re: Engine Noise   Mon Jul 27, 2015 9:09 pm

Really nice Kawi too Waterbottle!
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Oz1200Guzzi
Don Abbondio
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PostSubject: Re: Engine Noise   Mon Jul 27, 2015 9:33 pm

lucky Pete. You doing the LH side while you are in there?
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Pete Roper
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PostSubject: Re: Engine Noise   Mon Jul 27, 2015 9:49 pm

Oh shit yeah! What's the point of simply doing one? If I was going to skimp like that I'd just top & tail the shells like we used to with knocking Triumphs back in the day when we were stupid poor!

So far I've only pulled the left because I don't want both rods 'Loose' in the case at the same time or risk mixing the caps up!

I'd actually ordered a set of bearing shells from AF1 and luck would have it they were the right ones, (Most engines seem to use the 'Red' crank.) and new bolts a week ago so it shouldn't be off the road for long. Crankpin looks fine. I'll risk ovalisation of the big ends because it was still going hard, just very noisily!

Note that if you are in Oz buying the shells I the U.S. is a really good idea. $20 each, (Covering shipping costs.) versus $66 from here! I did this for Mark S's bike. It wasn't a huge saving but it was worth it! Just make sure you get the right shells.

Pete
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waterbottle
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GRiSO


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Age : 55

PostSubject: Re: Engine Noise   Tue Jul 28, 2015 2:06 am

So Pete, 88750 km, Unreal Thumbs Up Are you reusing the same pistons, rings etc
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Pete Roper
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PostSubject: Re: Engine Noise   Tue Jul 28, 2015 2:26 am

It's a well made piece of shit. Daniel Kalal's old Cali 2 was retired at 450,000 miles and it had never had the heads off!

My opinion is that while there was some poor thought and not enough development put in to the early iterations of the 8V the design is overall no more or less reliable than the old 2V models.

I love the 8V. It is still 'Visceral' in a way that many modern bikes aren't. It is also wonderfully simple and a joy to ride while being comfortable enough for even a broken-down old fart like me to still be able to feel like he's making an effort from time to time.

I would be disappointed in ANY modern vehicle that couldn't crack 100,000km without major work. In my experience poor servicing and ignorance of tuning is a far greater threat to the 8V than design faults. Mark S's and my bikes had both had tappet failures and mine had a faulty gasket seal on the lubricating oil pick-up. While some may think this is apologism for the marque I just see it as bad luck in my case and poor servicing prior to his ownership on Mark's. I don't baby my GRiSO. I revel in it! These sort of minor niggles are something I just consider the price of entry.

Pete
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frypan
Tanabuso
Tanabuso


Posts : 57
Join date : 2014-08-03

PostSubject: Re: Engine Noise   Wed Jul 29, 2015 10:02 am


I also found a bit of gasket missing from around the oil pick-up gallery between the spacer and crankcase. wrote:
Hey Pete,
Would that be similar to the missing gasket material pictured in the photo I sent on my wife's Norge (Norge Clanking)? My shop mechanic said the bolts seemed to be barely tight. Must have been put together by limp wristed Luigi. Rolling Eyes
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Pete Roper
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PostSubject: Re: Engine Noise   Wed Jul 29, 2015 2:57 pm

Mine were tight enough, gasket must of just been installed torn. Linky to pic of Norge sump?

Pete
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frypan
Tanabuso
Tanabuso


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PostSubject: Re: Engine Noise   Wed Jul 29, 2015 3:03 pm

Image below. Post was in Grisology under 'Clanking Engine On Norge'

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Pete Roper
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PostSubject: Re: Engine Noise   Wed Jul 29, 2015 5:53 pm

The missing bit wasn't stuck to the block? Mine was a small tear. That looks more like just a gasket that disintegrated as the spacer was removed. No worries though now that it's fixed.

Pete
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frypan
Tanabuso
Tanabuso


Posts : 57
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PostSubject: Re: Engine Noise   Wed Jul 29, 2015 6:04 pm

Unfortunately that missing gasket was not stuck to the block. Bits were found in the sump. It appears the oil pressure along with under torqued bolts caused the gasket to fail (break away). Engine emitted a nasty clanking at idle. It may have been that there was a tear or break that was the start of the destruction. Since replacement the engine has been quite. keeping fingers crossed that we don't have to go the same route as you. Bike has 58,000kms.
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Pete Roper
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PostSubject: Re: Engine Noise   Wed Jul 29, 2015 8:30 pm

Shit! So it was clanking? And they didn't just drop the caps off for a look? From where they were at its only another ten minutes work. I'd expect there to be substantial damage similar to mine if it was clanking. A plain bearing just can't work without oil pressure. The oil isn't in there to 'Make bits slippery'.

Pete
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frypan
Tanabuso
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PostSubject: Re: Engine Noise   Wed Jul 29, 2015 11:07 pm

Shocked I sure hope no damage. I'll mention it it to the shop this weekend. affraid
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