Author Topic: DIY Egli Sohc 4 (Read 136962 times)

ahhhm,...why we did not meet at Spa?
Great event, but I have to contradict. I never have seen so many Laverdas out there.

some pics, Piero Laverda, Dholdas....

At the old VIP pits I saw a very unique 750. Is it a Rob North framed CB750?

nippon

mec · « **Reply #256 on:** June 24, 2009, 10:45:12 AM »

today i did a test.
you know, i "repaired" a stock cam (with a broken tab) by tig welding.
today i did the "hammer test" and broke the welded tab off of the camshaft. not the repair broke, but the tab near the shaft. this seems to be a good sign, the repair is stiffer than the stock one..

in front the test cam, in the background the repaired racing one.

mec

mec · « **Reply #257 on:** June 25, 2009, 12:05:49 PM »

waiting for the valves and the cam.

in the meantime i worked to make fit the racing alternator.

mec

mec · « **Reply #258 on:** June 25, 2009, 12:21:54 PM »

knowing that there are undercut gears, i found another way to optimize the "popping out of 4th gear" issue:
as can seen in the first picture, the trany is in 4th gear and gear 4 and 3 are not engaged all the way (despite a new shifting fork). i decided to grind 0.5mm off of the washer between gear 4 and 3 and to add a 0.5mm washer between gear 4 and 1. this locates the 4th gear wheel 0.5mm to the right side giving more secure power transmission.

mec

voxonda · « **Reply #259 on:** June 25, 2009, 01:08:28 PM »

Hey nippon,

Looks like everyone here has trouble finding eachother at Spa, kept looking for you and Ted all weekend but to no availle.
Yes this is a Rob North framed Honda as raced by Joey Dunlop R.I.P at the Isle of Man, I think it was '76 or '77.
There were some beautiful bikes out there, but loved the sound of the MV 'hauling' the most. Also loved to see the special Aero '74 bike with the big seat and the wings on the fairing.
Big shame we did not meet.

Cheers, Rob

nippon · « **Reply #260 on:** June 25, 2009, 01:50:04 PM »

Hi voxonda,
I don't wanna hijack mec's thread again, but for next year we need a professional event manager for a meeting in Spa.
Obviously, we are not able to do it by ourself.

nippon

voxonda · « **Reply #261 on:** June 25, 2009, 02:28:37 PM »

You're right nippon. Sorry for that mec.

Rob

Jerry Rxman Griffin aka MuthaF'er · « **Reply #262 on:** June 25, 2009, 07:12:25 PM »

Mec,

While you are waiting can you fill us in (again probably) on the alternator?

mec · « **Reply #263 on:** June 26, 2009, 12:46:20 PM »

some comments on the alternator:

i bought the complete set (magnesium alternator cover, alternator and rotor) from a swiss dealer (rfaeh1@bluewin.ch).
it took me one day to make fit the alternator coil to the cover. in addition to this the rotor had a 20mm hole which had to be adapted to the crankshaft cone.

rectifier/regulator is type 2 from http://www.elektronik-sachse.de/

this type is adjustable so that i can choose the voltage for my 14.4V LiFePo accus.

mec

turboguzzi · « **Reply #264 on:** June 26, 2009, 03:01:53 PM »

Hei Mec

Two guys from my club with a CB500 are currently neck to neck with Piero Laverda (and his 500 twin ) in the italian classic endurance championship. They won the other weekend in Rijeka, the Laverda was second in the 500 class.

If I am not mistaken, Spa has only one open class, not much chances with a small 500 right?

TG

mec · « **Reply #265 on:** June 27, 2009, 08:02:04 AM »

hi tg,

yes, in endurance there was only one open class.
but the results i have seen, a sohc 750 F2 (far east team, probably 820?) finished 19th. a good running cb 500 could do the same.

here are all results
http://www.ris-timing.be/~vitesse//4hours/2009/index.htm

link to the winning team:
http://www.motobel.fr/

for fun:
my ordered camshaft and the valves are on sightseeing tour around the world. here the tracking info

Label/Receipt Number: EC71 6905 215U S
Class: Express Mail International®
Status: At Foreign Delivery Unit

Your item arrived at the delivery Post Office in AUSTRALIA at 9:31 PM on June 25, 2009. Information, if available, is updated periodically throughout the day. Please check again later.

Detailed Results:

At Foreign Delivery Unit, June 25, 2009, 9:31 pm, AUSTRALIA
Out of Foreign Customs, June 25, 2009, 1:18 pm, AUSTRALIA
At Foreign Delivery Unit, June 24, 2009, 10:26 pm, AUSTRALIA
Out of Foreign Customs, June 24, 2009, 3:57 pm, AUSTRALIA
Into Foreign Customs, June 24, 2009, 1:42 pm, AUSTRALIA
Arrived Abroad, June 24, 2009, 1:41 pm, AUSTRALIA
International Dispatch, June 18, 2009, 10:46 pm, ISC CHICAGO IL (USPS)
Arrival Electronic Shipping Info Received, June 17, 2009
Processed through Sort Facility, June 17, 2009, 6:21 pm, AUSTIN, TX 78710
Acceptance, June 17, 2009, 3:53 pm, AUSTIN, TX 78749

hoping the items will arrive soon

mec

moham · « **Reply #266 on:** June 27, 2009, 09:21:18 AM »

Quote from: mec on June 27, 2009, 08:02:04 AM

hi tg,

yes, in endurance there was only one open class.
but the results i have seen, a sohc 750 F2 (far east team, probably 820?) finished 19th. a good running cb 500 could do the same.

here are all results
http://www.ris-timing.be/~vitesse//4hours/2009/index.htm

link to the winning team:
http://www.motobel.fr/

for fun:
my ordered camshaft and the valves are on sightseeing tour around the world. here the tracking info

Label/Receipt Number: EC71 6905 215U S
Class: Express Mail International®
Status: At Foreign Delivery Unit

Your item arrived at the delivery Post Office in AUSTRALIA at 9:31 PM on June 25, 2009. Information, if available, is updated periodically throughout the day. Please check again later.

Detailed Results:

At Foreign Delivery Unit, June 25, 2009, 9:31 pm, AUSTRALIA
Out of Foreign Customs, June 25, 2009, 1:18 pm, AUSTRALIA
At Foreign Delivery Unit, June 24, 2009, 10:26 pm, AUSTRALIA
Out of Foreign Customs, June 24, 2009, 3:57 pm, AUSTRALIA
Into Foreign Customs, June 24, 2009, 1:42 pm, AUSTRALIA
Arrived Abroad, June 24, 2009, 1:41 pm, AUSTRALIA
International Dispatch, June 18, 2009, 10:46 pm, ISC CHICAGO IL (USPS)
Arrival Electronic Shipping Info Received, June 17, 2009
Processed through Sort Facility, June 17, 2009, 6:21 pm, AUSTIN, TX 78710
Acceptance, June 17, 2009, 3:53 pm, AUSTIN, TX 78749

hoping the items will arrive soon

mec

I'd call the post office and have them stuff your parts in a bottle and chuck it in the sea. At least that way you'll have a fighting chance...

This is a fantastic thread, by the way, I'm learning a ton just reading through it. Keep it coming...

turboguzzi · « **Reply #267 on:** June 28, 2009, 01:22:50 PM »

Hei Mec

Thanks for the link to the results!

If a CB750 ended up so low, I am afraid that a CB500 wouldnt have reached the minimum to qualify, I am afraid....

Nice to see that Mr. Ifrah's Guzzi (motobel) kicked everybody's ass, Z1, GS1000 and big SOHCS too! Even Stephan Mertens of Team Bike!

I race a CB500 but am very much a guzzista at heart...... makes me want to turn my LM III into a racer too, even if I have all the pieces for a full original restoration.

I've seen you are into guzzi's too. know this site? http://www.animaguzzista.com

simon#42 · « **Reply #268 on:** July 05, 2009, 02:23:51 AM »

Quote from: turboguzzi on June 26, 2009, 03:01:53 PM

Hei Mec

Two guys from my club with a CB500 are currently neck to neck with Piero Laverda (and his 500 twin ) in the italian classic endurance championship. They won the other weekend in Rijeka, the Laverda was second in the 500 class.

If I am not mistaken, Spa has only one open class, not much chances with a small 500 right?

TG

not much chance on a 500 at spa im afraid , but you never know the best lap in the 4h race was nearly 4 seconds slower than the icgp race and that was on a 350 [ a 74 hp light 2 stroke mind ]
great event to watch though , you cannot believe how loud it is in that covered grandstand on the old start line!

SteveD CB500F · « **Reply #269 on:** July 05, 2009, 01:06:03 PM »

Quote from: simon#42 on July 05, 2009, 02:23:51 AM

you cannot believe how loud it is in that covered grandstand on the old start line!

We sat there for a while on Saturday morning before deciding that we'd either have to go back to the hotel for our earplugs or move. We moved to the paddock.

turboguzzi · « **Reply #270 on:** July 05, 2009, 01:42:09 PM »

Simon, tz350's are known giant killers, so am not surprised at all.

In the vintage class i race in italy we have a separate classifications for the two strokes, no production based 500 four stroke (like my CB500F) could ever stay with a 350 two stroke. Tha fastest CB500F rider here is a good 2-4 seconds slower than the best TZ350 riders in most tracks and he is one mean rider and top tuner.

TG

simon#42 · « **Reply #271 on:** July 05, 2009, 02:32:06 PM »

hi turboguzzi , due to old age and stupidity i had forgotten that it rained after the icgp race . in the dry the times are very similar . its a pity spa clashed with the classic club meeting at donington or we would have seen a few more fast tzs i raced a 500 laverda for a couple of years as well as my tzs and there was no comparison at all the tz was much much quicker !!!
anyone going to chimay?

malcolmgb · « **Reply #272 on:** July 06, 2009, 01:15:07 PM »

Quote from: simon#42 on July 05, 2009, 02:32:06 PM

its a pity spa clashed with the classic club meeting at donington or we would have seen a few more fast tzs

Yes I had to make do with Donington too

I will perhaps make it to Spa one day. It was good seeing and hearing a pack of TZ's again though but the best sound of the day was Lea Gourlay on the Paton.

turboguzzi · « **Reply #273 on:** July 06, 2009, 03:27:37 PM »

Lea was here in italy too and proceeded to destroy the locals,

great rider, but form what I hear, those who are up against those patons in IHRO are getting upset, the 4 valve version is supposed to have more than 70 hp..... no manx or G50 can keep up with them.

Mec, are you OK with us kidnapping your thread?

:-)

TG

mec · « **Reply #274 on:** July 06, 2009, 11:42:31 PM »

Quote from: turboguzzi on June 28, 2009, 01:22:50 PM

I've seen you are into guzzi's too. know this site? http://www.animaguzzista.com

yes, cause my friend peter prepares racing guzzis, i am a little bit into guzzis too.
thanx for the link, didn´t know that.

Quote from: turboguzzi on July 06, 2009, 03:27:37 PM

Lea was here in italy too and proceeded to destroy the locals,

Mec, are you OK with us kidnapping your thread?

:-)

TG

thats ok, i feel very comfortabel with all the racing related stuff here

mec

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Author Topic: DIY Egli Sohc 4 (Read 136962 times)