What did you do to or for or with your Laverda today?

Andy J said:
Visited Dave Fitz's emporium yesterday to talk about 500 race bikes and drop off a gear cluster I acquired from Belgium about 3-4 years ago that came from a F500. We compared it with a standard gearbox cluster and 1st and 2nd gears were noticeably different as was the 6th gear.
The parts list suggests the F500 had different 1st, 2nd and 3rd gear differences, so perhaps a previous owner decided to make further changes.
Whatever, Fitz is planning to see if he can get the gears replicated at a hopefully affordable price.
I also took a box of other gear clusters I had collected from a couple of different sources that I hadn't really studied previously. Most looked standard, but one looked different again to the std and F500 version of the 500 gearbox. Perhaps it's from a 350 or even an Atlas as I suspect they might be different again. I need to dig deeper.
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Hi Andy,
I am just planning comming weeks to split my Harris 600 engine with a close ration gearbox (very, very long first). Is there something you like to know or see in pictures?
 
Otto said:
Hi Andy,
I am just planning comming weeks to split my Harris 600 engine with a close ration gearbox (very, very long first). Is there something you like to know or see in pictures?
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Hi Otto
Any information would welcome, including photos, but the number of teeth on each gear would be even better.
If you post to Gareth’s thread on the forum ‘close ratio gearbox’ any new info along with info anybody else has on 500 gear boxes (and related variants) that will be great.
Andy
 
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mauricejota7604 said:
Hi Chris it’s a TT replica although packed with sound deadened it’s very loud
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95db limit at the island on Dec 4 Maurizio - no idea how or where they measure that but the owners say 'aftermarket mufflers' will probably fail! My bike was RWCd in June - if I have any hassles this time (don't ask) I'll be sending Doug and Dinsdale to chat to management!
 
Apparently the noise meter is just past the start finish line but I am sure there are a shit load of bikes like the Irving Vincents and a couple of Special Laverda’s from a northern state that would shatter that noise meter. My Black Betty was measured at over 100 dB
 
They must either put the noise meter away on race days or accept a higher limit. Was the same limit at Broady and Red said a couple of the hogs failed and were out.
When I had all those hassles with the Duke Club track day at the Island about 25 years ago the noise meter was down near the dip at the end of the straight. My sister went down and chatted to the guy operating it to get an idea of what I was putting out. By that stage I was backing off there after the club scrutineer gave me the goss! Red reckons the Mule is only loud in the pits when starting :cool:
 
Sounds from vintage race bikes are so odd, Laverda Triples I don't find annoying loud. There are only a few that I didn't like much that I remember. The worst I remember hearing was a Bunch of Honda Twins, Bill Houseman rings a Bell. They were agonisingly loud. Finger in the ear painful.
 
Vince said:
Sounds from vintage race bikes are so odd, Laverda Triples I don't find annoying loud. There are only a few that I didn't like much that I remember. The worst I remember hearing was a Bunch of Honda Twins, Bill Houseman rings a Bell. They were agonisingly loud. Finger in the ear painful.
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But they probably didn't have the low frequency pulses that create db and set off noise meters - think Fender Strats through Twin Reverbs vs a thumping bass through a good speaker box. Or what you can hear from that stadium rock concert a km away.
 
"Noise" measurement is a science, not a hand over a meter to a support person and state "your in or your out" Weighting curves are part of the science. Position of adjacent walls or similar surfaces, angle of measuring device/meter to emitting source, et al. Very subjective application of audio noise measurement in motorcycle rule adherence. Comparative noise measurement would have a better result, dedicated criteria for those measurements, aligned to motorcycle engine/induction/exhaust and mechanical emissions. 'nuf from me...j
 
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