Topic: good weekend for some...

[turboguzzi]

not so for others,

Riccardo bent valves on his 750....

luckily someone lent him a nice laverda 500 to do the race

[turboguzzi]

good action out there.

a new class called guzzi cup is proving popular

three sohc riders battling it out at the bottom

[turboguzzi]

my own toy behaved well, another 4th place, missed the podium by just a couple of seconds after a race long battle with a friend, good fun.

We had some UK guys, John Cronshaw was here as well as Bob Dixon with his 500 Laverda,

we have a long break now till next race in july, time to work on my airbox project, fit an RD350 fork with cartridges and maybe a 650 sump and primary chain tensioner. should keep me busy.

TG

[bwaller]

Tough luck Riccardo, what was the cause of your problem? Or should I ask. 

TG, didn't you tell me there was some issue with those RD forks?

[MRieck]

Tough luck Riccardo, what was the cause of your problem? Or should I ask. 

TG, didn't you tell me there was some issue with those RD forks?

I 'm interested in that too.

[turboguzzi]

he told me he might have over revved, he might have to tear the engine appart to know

the only issue with tht RD forks was lack of time....

I dont like the fact that it has only through holes for the axle in the legs, no means of clamping on the axle,

but other than that they are a few kilos lighter than the stock ones and have double teflon bushings,

so should be an improvement

TG
 

 

[Sam Green Racing]

Laverda  it helps when you mix in the right circles good lad Riccy

Sam.

[livefast_dieold]

Last weekend I've learnt to always double check valve-piston clearance after cam timing! A missed gear and ex valves high five pistons, luckily I only bent them so not a lot of money to repair the engine (I'm thinking on cyclex super flow valves, are they ok? plus the aluminium valve retainer)

A friend of Piero Laverda lent us his Formula 500, and the guy in the first picture crash it just after I ended my turn. Not a lot of damage even it this case, but not a nice thing to do. He says that he braked on some dirty stuff and the bike suddendly fell down...

Not a great weekend but I've learned a lot on how building a race bike, how to drive it and how to choose an endurance pilot among your friends 

[livefast_dieold]

a pics of the bike befora damages:

[turboguzzi]

now, thinking of it, Howell had a bizarre valve bending story due to material coming off the fiberglass tank and sticking to the guides.... inlets though.

check if they are free in any case.

to do a proper job of checking valve clearance mount just one set with weak springs you can push by hand

TG

[Sam Green Racing]

My fiberglass tank sprung a leak within 15 minutes of putting the fuel in.

Sam.

[Howell]

my own toy behaved well, another 4th place, missed the podium by just a couple of seconds after a race long battle with a friend, good fun.

We had some UK guys, John Cronshaw was here as well as Bob Dixon with his 500 Laverda,

we have a long break now till next race in july, time to work on my airbox project, fit an RD350 fork with cartridges and maybe a 650 sump and primary chain tensioner. should keep me busy.

TG

Good result TG.
Why do you have your seat so high ?
Is it allowed to have a airbox on a classic racer ?

[Howell]

now, thinking of it, Howell had a bizarre valve bending story due to material coming off the fiberglass tank and sticking to the guides.... inlets though.

check if they are free in any case.

to do a proper job of checking valve clearance mount just one set with weak springs you can push by hand

TG

Indeed , material from the fibreglass tank was the cause of our inlet valve problems.
Don't use a fibreglass tank with modern or race fuels !!!!!!
But we had enough valve to piston clearance.

[turboguzzi]

my own toy behaved well, another 4th place, missed the podium by just a couple of seconds after a race long battle with a friend, good fun.

We had some UK guys, John Cronshaw was here as well as Bob Dixon with his 500 Laverda,

we have a long break now till next race in july, time to work on my airbox project, fit an RD350 fork with cartridges and maybe a 650 sump and primary chain tensioner. should keep me busy.

TG

Good result TG.
Why do you have your seat so high ?
Is it allowed to have a airbox on a classic racer ?

Thanks howell, I think I can now say that it took three years and some 20 races to really feel good on the bike, my first race  in this track i was doing 1:37's, I was down to 1:29'-1:28's all of last race. nice satisfaction.

Seat? I am 1.90m tall, need a bit of room for my legs to bend

Nothing in our rulebook says that you cant put an airbox and those bikes came with one stock. not that the one i am building is going to like like the stock one...

[Howell]

he told me he might have over revved, he might have to tear the engine appart to know

the only issue with tht RD forks was lack of time....

I dont like the fact that it has only through holes for the axle in the legs, no means of clamping on the axle,

but other than that they are a few kilos lighter than the stock ones and have double teflon bushings,

so should be an improvement

TG
  

Using a RD350 YPVS fork is a big improvement , but not only the fork , very important is also the right springs , oil viscosity and oillevel and the right setup of the dampervalves.
Our fork is working very well , but the setup is done by a skilled mechanic from YSS shocks Europe.

[Joksa]

the only issue with tht RD forks was lack of time....

I dont like the fact that it has only through holes for the axle in the legs, no means of clamping on the axle,

Do you have any detailed pictures? I am considering a fork upgrade for my CB500K0, but I don't have any rule restrictions (road bike, maybe occasional track day),
but I would like maintain the bike as "period correct" as feasible. I already have 18" GPZ305 (or optionally 19" 440LTD) front wheel so I might just swap EX500 (GPZ500S) 36mm forks and try to disguise the triple trees/yokes as much as possible and use 36mm telefix clip-ons I have waiting. Retrofitting cartridge internals also sounds very appealing...

[turboguzzi]

detailed pictures of what exactly? If you are not limited by racing rules to a 35mm fork, then 36 will still look pretty period IMHO and be more rigid.

TG

[Joksa]

detailed pictures of what exactly?

I was mainly interested on the RD350 front axle setup and also brakes. But I probably go GPZ route and use also brakes from Kawa. (Hmm... I also waiting for set of KZ650 mikunis, looks like my CB is slowly turning into a Kawasaki)

I have been searching info about retrofitting cartridges to 35-39mm forks but really haven't found anything usefully yet. Maybe I just have buy a set of cbr600f2('94 only) or f3 41mm cartridge forks and see how the internals look like.

[Sam Green Racing]

Know this one TG?

http://www.motocicliveloci.it/images/pezzipregiati/honda3.JPG

Sam.

[turboguzzi]

Know this one TG?

http://www.motocicliveloci.it/images/pezzipregiati/honda3.JPG

Sam.

yep, massimo, the shop owner is a good friend.

it's a pretty stock bike other than the Menani tank and seat. sat on it and the tank is not that comfy, but sure good looking.

TG