valve adjustments

[Guest ckamin]

Although I am in California, I am all about how my bike runs/performs and engine life/longevity. Which specs should I set the valves at and anyone have any specific recommendations or suggestions?

 

Thanks in advance!

 

-Carl

[Skeeve]

Although I am in California, I am all about how my bike runs/performs and engine life/longevity. Which specs should I set the valves at and anyone have any specific recommendations or suggestions?

 

Thanks in advance!

 

-Carl 

73035[/snapback]

 

Consensus is that Euro spec is the minimum for decent performance, w/ the Raceco specs at the upper end.

 

Ride on!

[dlaing]

I put on my website:

Clearance specs (US): intake: 0.002" (0.05mm), exhaust: 0.004" (0.10mm)

 

Clearance specs (rest of world): intake: 0.004" (0.10mm), exhaust 0.006" (0.15mm)

 

I like mine set to 0.006"(0.15mm) intake and 0.008"(0.20mm) exhaust.

 

RaceCo recommends 0.008"(0.20mm) intake and 0.010"(0.25mm) exhaust

 

But I got to thinking the manual says intake: 0.004" (0.10mm), exhaust 0.006" (0.15mm)

in every language.

So the "US spec" maybe the same as the "World spec"

I think the term "US spec" originated in other Guzzis

Can anyone verify?

In any case any spec other than the US spec is good enough.

One person suggested they got better fuel consumption at

intake: 0.004" (0.10mm), exhaust 0.006" (0.15mm)

Others suggest the bike idles better with more gap.

YMMV

[Alex-Corsa]

RaceCo recommends 0.008"(0.20mm) intake and 0.010"(0.25mm) exhaust

 

Is it perhaps so when using their own Valve kit (and or with some mods in the valve seats)???? And not the OEM Guzzi?

AFAIK is OK to be a bit more than less.

[dlaing]

Is it perhaps so  when using their own Valve kit (and or with some mods in the valve seats)???? And not the OEM Guzzi?

AFAIK is OK to be a bit more than less.

73074[/snapback]

I don't think so.

They wrote the following on their website http://www.raceco.com/tech.html

Tappet clearances for two and four valve engines

Two valve engines

Tappet clearances for the Guzzi big twins should be set to 0.20mm for the inlet and 0.25mm for the exhaust.  This also applies to the "modern" Guzzis such as the Sport 1100, Cali 1100i and V11.  The factory settings for these bikes are 0.10mm and 0.15mm respectively, but this is to try and reduce engine noise to meet US emissions regulations.  With tappets set this tight the engines have trouble ticking over and running cleanly at low revs.

[Guest trispeed]

I have a california spec, 2004 v11 sport. the sticker on the bike says .15mm IN and .20 ex.; where did this .05/ .10 spec come from?

older models, I suppose?

[rocker59]

I have a california spec, 2004 v11 sport. the sticker on the bike says .15mm IN and .20 ex.; where did this .05/ .10 spec come from?

older models, I suppose?

84667[/snapback]

 

My 1996 Sport 1100 Owner's Manual, on page 138, recommends:

 

*intake valve: 0.10mm

*exhaust valve: 0.15mm

 

*USA version:

intake valve: 0.05

exhaust valve: 0.05

 

(The "modifications" insert that I have in the Owner's Manual for the 1997 injected Sport 1100 recommends intake 0.05mm/exhaust 0.10mm).

 

(I run my carb'd Sport at the "Euro" 0.10mm intake/.15mm exhaust and it is much happier... and tappier!!!)

 

 

My Nero Corsa's Owner's Manual, on page 172, recommends:

 

Intake valve 0.10mm

Exhaust valve 0.15mm

 

(the sticker on the rear "hugger" mud guard recommends .15 and .20 !!!)

 

 

[Baldini]

...Is it perhaps so  when using their own Valve kit ....

 

For all bikes I think. I spoke w/ Amadeo (Raceco) long time back & he told me 0.20mm in/0.25mm ex was best for my stock V11 (as Dave notes from their website). They used even bigger clearances on their racebikes.

 

Note that Guzzi spec'd 0.22mm (.0086") clearance both in & ex on old Tontis.

 

KB

[jrt]

I have a california spec, 2004 v11 sport. the sticker on the bike says .15mm IN and .20 ex.; where did this .05/ .10 spec come from?

older models, I suppose?

84667[/snapback]

 

I think the smaller values are an attempt to cut down on engine noise and pass stricter noise regulations. I could be wrong, but that's my impression.