Author Topic: Norwegian cafe.. Oil tank in the swingarm.... (Read 97512 times)

lordmember1969 · « **Reply #375 on:** May 21, 2012, 10:56:18 PM »

Quote from: strynboen on May 21, 2012, 10:48:13 AM

that beer..breather??up behind seat..tuborg??danish dynamite

Yes

me like it:) Got about a million empty cans in the garage:) finally found some use for one:)

lucky · « **Reply #376 on:** May 26, 2012, 10:19:56 PM »

Quote from: lordmember1969 on May 20, 2010, 02:26:36 PM

Very pleased with the welding of the brake bracket

Some more grinding and polish and it will look alright:)

Tack welded first with all the parts in place to get it in the right , then took it apart and welded all Cleaned all oil and dirt out of the tube first. But go to a professional welder to do this

Unfortunately that fork slider may be ruined now.
the shrinkage from the welding will have ruined it.
The tolerance is =+ or-.002 thousandths.

Better check that.

I love the fuel injection set up.

lucky · « **Reply #377 on:** May 26, 2012, 10:23:30 PM »

Quote from: lordmember1969 on May 13, 2012, 09:07:54 AM

Quote from: strynboen on May 13, 2012, 08:59:07 AM
you have a long vinter in norvay...and you use the time for some great procjekts...

Thanks Annyone know what would bee the best fork oil. Tried 10w 40 fork oil but the forks feel to hard and the return is to slow? Annyone had the same trouble?

Remember the welding you did on the fork slider?

strynboen · « **Reply #378 on:** May 27, 2012, 04:01:24 AM »

think the tolerence are / +-0,1mm its not so presise..i have just have splitted my 550 fork..its not that presise made..or it veared aut in the last 30 years..
put some hudralik oil in..sae 10/or20..it works fine..if the legs moves free dry.. then the veldings are not the problem..this hydralik dampers system are not that tight..the oil leaks raund its no problem...as long the oil stayes inside the leg

lordmember1969 · « **Reply #379 on:** May 27, 2012, 05:53:24 AM »

Quote from: strynboen on May 27, 2012, 04:01:24 AM

think the tolerence are / +-0,1mm its not so presise..i have just have splitted my 550 fork..its not that presise made..or it veared aut in the last 30 years..
put some hudralik oil in..sae 10/or20..it works fine..if the legs moves free dry.. then the veldings are not the problem..this hydralik dampers system are not that tight..the oil leaks raund its no problem...as long the oil stayes inside the leg

The forks move freely when no oil in it, just think the return is a bit slow. Can off course be affected by the welding off the fork:) But do not think so.. Will try out thinner oil and see what happens...
thanks for tips

strynboen · « **Reply #380 on:** May 27, 2012, 09:21:40 AM »

you can mix it up with ATF to get it thinner.. i think...but are not 100% that,,,, atf are sae 5-10..and standart hydralik oil are 10-25 sae..but i drive only hyd oil..have soft springs in my 550..and the cbx needs thik oil too..

lucky · « **Reply #381 on:** May 27, 2012, 10:59:27 AM »

Take a calipers and measure 1mm=.0397 and see what that looks like. Now devide that in half.

.020 thousandths or 1/2mm easy to distort that much.

Thats is why the fork leg is cast in one piece.
If the fork leg is the problem, the get another one and then cut the old one in half with a band saw and send the photo.

MCRider · « **Reply #382 on:** May 27, 2012, 11:48:12 AM »

Quote from: strynboen on May 27, 2012, 09:21:40 AM

you can mix it up with ATF to get it thinner.. i think...but are not 100% that,,,, atf are sae 5-10..and standart hydralik oil are 10-25 sae..but i drive only hyd oil..have soft springs in my 550..and the cbx needs thik oil too..

many manuals recommend straight ATF. Just saying...

strynboen · « **Reply #383 on:** May 27, 2012, 11:57:36 AM »

yes my cbx manual says atf...but then it get for soft..that fork are a veak point on 78/79 cbx

MCRider · « **Reply #384 on:** May 27, 2012, 12:28:06 PM »

Quote from: strynboen on May 27, 2012, 11:57:36 AM

yes my cbx manual says atf...but then it get for soft..that fork are a veak point on 78/79 cbx

By too soft, do you mean on compression or rebound?

Compression is controlled by the spring almost exclusively. If you are too soft on compression, you need better springs, not heavier oil.

The weight of the oil dampens the rebound almost exclusively.

lordmember1969 · « **Reply #385 on:** May 27, 2012, 01:13:50 PM »

Quote from: lucky on May 27, 2012, 10:59:27 AM

Take a calipers and measure 1mm=.0397 and see what that looks like. Now devide that in half.

.020 thousandths or 1/2mm easy to distort that much.

Thats is why the fork leg is cast in one piece.
If the fork leg is the problem, the get another one and then cut the old one in half with a band saw and send the photo.

Will try thinner oil first:) If it does not work I may have f.......ed up the fork... Have another set so no problem:)

Thanks guys

lordmember1969 · « **Reply #386 on:** May 27, 2012, 01:23:46 PM »

Even if not pleased with the rebound on the front fork I am very pleased with most of the modifications done to the bike. Brakes and oiltanks works very well. Bike handles well, but still not done with it. Probably stay this way the rest of the summer except for trying out thinner fork oil and working out the "bugs" as they eventually shows up.

Thanks for the input

bert96 · « **Reply #387 on:** May 27, 2012, 02:20:58 PM »

About the fork,i would like to know if it's doable with the ''right'' technique because i'm planning of doing the same thing....

Retro Rocket · « **Reply #388 on:** May 27, 2012, 03:54:23 PM »

Quote from: bert96 on May 27, 2012, 02:20:58 PM

About the fork,i would like to know if it's doable with the ''right'' technique because i'm planning of doing the same thing....

Its doable mate, my Cerranni's were welded at the base of the fork legs so brembo's would fit, no problems at all.... I have seen plenty of modded fork lowers to accept different calipers, if done properly there are no problems at all, lucky is a bit alarmist about a lot of things....

bert96 · « **Reply #389 on:** May 27, 2012, 04:07:32 PM »

AAAHHHH!!!!!!! i breath a little bit better

Thanks

Bert

lordmember1969 · « **Reply #390 on:** May 28, 2012, 04:10:55 AM »

Quote from: bert96 on May 27, 2012, 04:07:32 PM

AAAHHHH!!!!!!! i breath a little bit better

Thanks

Bert

Syscrush · « **Reply #391 on:** May 29, 2012, 10:34:41 AM »

Looking awesome.

lucky · « **Reply #392 on:** June 01, 2012, 05:27:18 PM »

Quote from: Retro Rocket on May 27, 2012, 03:54:23 PM

Quote from: bert96 on May 27, 2012, 02:20:58 PM

About the fork,i would like to know if it's doable with the ''right'' technique because i'm planning of doing the same thing....

Its doable mate, my Cerranni's were welded at the base of the fork legs so brembo's would fit, no problems at all.... I have seen plenty of modded fork lowers to accept different calipers, if done properly there are no problems at all, lucky is a bit alarmist about a lot of things....

Not in this case.
That was a lot of welding on that fork lower.
I am also a certified welder, and a certified welding inspector.
Aluminum has a lot of shrinkage in the weld area.

That is why they are cast or machined,not welded.

Try this..Take a disc or tube the minimum size of the inside of the fork leg and try pushing it down the tube. You will find out real fast if it still round.

Quote:
"Its doable mate, my Cerranni's were welded at the base of the fork legs so brembo's would fit..."

The result of ALL welding is shrinkage. Otherwise after it is all finished, and cooled down it will be smaller.

bert96 · « **Reply #393 on:** June 01, 2012, 05:31:49 PM »

And if i have only the half of welding compare to this one,is it ok?

Bert

...i hope the answer is yes

Retro Rocket · « **Reply #394 on:** June 01, 2012, 07:27:01 PM »

Lucky, my point is that it can be done, has been done and will be done again, all the ones i have seen have been on race bikes, if it was "too risky" they certainly wouldn't be on the track...

MCRider · « **Reply #395 on:** June 01, 2012, 08:16:47 PM »

My dad, RIP, was a mechanical engineer for Allisons come Detroit/Diesel/Allisons come Allison Gas Turbines. When he died he had 22 patents registered to him. Knew what he was doing.

I can't tell you how many things he told me couldn't be done that were being done on motorcycles.

Drove me crazy, but I loved that guy.

Mtmooradian · « **Reply #396 on:** June 01, 2012, 08:33:09 PM »

Well here's the deal..... Lucky your nuts(in a good way) it will be fine to weld the leg as long as its TIG welded..... The reason you get distortion is because of the different temps in your weld area to the rest of the piece. With TIG the whole leg will have heated and expanded while your are welding. As it cools it shrinks at the same rate. With steel and mig welding the only area that is hot is your weld area. When it cools, it shrinks and causes distortion.
Also compression is controlled by spring rate and air spring(amount air in forks) more oil means more comp. valving and oil weight are for rebound. And don't forget rebound has no affect on compression, but compression affects rebound. So get your compression set first.

Retro Rocket · « **Reply #397 on:** June 01, 2012, 08:34:33 PM »

Geeze Ron, 22 patents, thats quite an achievement....

strynboen · « **Reply #398 on:** June 02, 2012, 01:28:50 AM »

all damping are done inside the inner leg...the aluminium auter leg..are only.. holding all straight..so a deform auterleg vill just make it move more or less. free.and in this case..the leg mowes free and fine...so no problem..
all veldings give stress and deforming...only ultrasaund can se inside..if it cracks. or not are veldet komplet together.that are the real problem in this case..but all here are made ekstra strong to give it that ekstra safty tolerece
have been velder for 5 years in vestas/ neg/ vindmills ..have meet a lot of kontrols..the inspektors are nice peapel....most of the time

MCRider · « **Reply #399 on:** June 02, 2012, 06:04:11 AM »

Quote from: Retro Rocket on June 01, 2012, 08:34:33 PM

Geeze Ron, 22 patents, thats quite an achievement....

Yeah I saw them. Always Inventor: James R. D----; Owner: General Motors. A little less than 1 per year. Many were for special parts in the reduction gear boxes of turboprop aircraft. Where they reduce the speed of the turbine shaft to a lower rate to drive the prop so the prop doesn't fly apart.

But to be fair, many engineers for big corps get patents, but they sign away their rights in their employment agreements. SOP

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Author Topic: Norwegian cafe.. Oil tank in the swingarm.... (Read 97512 times)