Wanted: more and faster....

[Brian d marge]

Try concrete ...that would stiffen the forks up...or TAR ....TAR is good because it doesnt stiffen up so much compared with concrete....

Just because changing the oil is cheap , I know where your comming from ,,been there tried to avoid the expense ,,,bit bullet ,,and it turned out to be cheap ,,about 3000 yen each front spring ,,,should have done it straight away...
Why I am spending a bit of time , replying here AGAIN . is because of the incorrect advise given ,,,repeatedly ,,,,
You all would be upset if I advised , to change the spark pug use a Mole wrench and a hammer ....
So to return ,,,If you used tar ,,,the forks after hitting that big pot hole ,,would work ,ie deflect ..BUT it will take a week to return to its original position ......
What will happen is ,,when you increase the oil viscosity ( a couple of point wont make a hill of beans difference ) .. when you are cranked over in a long sweeper ,,and there are small ripples in the road ,,the front end wont be doing the best job ,,and will be skipping and sort of deflrcting at a tangent ,,,ie the front will tend to wash out towards the outside of the curve ....

Now IF you are happy with that then fine oil is cheap and will make the frontend slower and feel ( the use the word firmer ) ....

I will post video ...it 318 meg * i dont know how to make smaller yet * ,,so Ill zip it and post ,,,Watch the back end ,,,,that is with ATF and an incorrect spring with preload to compensate ..( ie get the sag back to where it should be ..) .....also watch the front ,,,ATF ,,,no rebound ( shit forks ) and incorrect spring rate ,,,to soft ...

Basically the bike is impossible to ride ,,,,,..it wont hook up and cant handle the bumps ....Useless in other words ...

Stephen

PS the file isnt loading if anyone needs/is curious just pm Ill send

[HDTboy]

The reason I said to change the fork oil, is because it's more than likely old, and has lost its viscosity. New oil is cheap, and may give all the improvement needed

[Bonez]

The reason I said to change the fork oil, is because it's more than likely old, and has lost its viscosity. New oil is cheap, and may give all the improvement needed

One can use ATF if one likes, which is cheaper still.

[TwoSeven]

The reason I said to change the fork oil, is because it's more than likely old, and has lost its viscosity. New oil is cheap, and may give all the improvement needed

I keep making the mistake people maintain their bikes (sans fluid and stuff) so I didnt mention the old oil thing.

[HDTboy]

One can use ATF if one likes, which is cheaper still.

I don't know about that, 10 weight oil is about $15-$20 (retail) per litre, you only need 375 mLs for each fork on a CBR250

PS. Brian: these bikes don't have factory adjustment built into them, so you need to play around with different oils and spring spacers to tune the suspension on them

[TonyB]

Reading one of the replies this may be of no use, but the easiest way of brightening you headlights is to get Xenon bulbs. Somewhere on here I posted a pic of my bike with one standard and one Xenon bulb. They DO work. BUT, if you get the blue tinted ones they wont be as bright as the plain ones- they get the tint by colouring the glass

[Brian d marge]

I don't know about that, 10 weight oil is about $15-$20 (retail) per litre, you only need 375 mLs for each fork on a CBR250

PS. Brian: these bikes don't have factory adjustment built into them, so you need to play around with different oils and spring spacers to tune the suspension on them

I know ...Honda amazes me ,,they build say a NSR ..wissy go fast and a nice looking bike ,,then the stick a set of non adjustable undersprung ( for westerners ) useless bits of crap ..on the front ...( now I now the factory I know why ,,,) ...
The oil will control the rate of the forks throughout the whole shaft speed range ,,the spacer ( preload spacer??) will control the initial force needed to deflect the spring ...aftr that its valving and / or shim stack ( read money ) ..Your coment about old oil was a very valid and a good one ,,,I change my fork oil every second or third race ,,,( I buy 4 litres of ATF and use it in the gearbox , front and rear shocks .,,,its a bit thick ,,but at my level I wouldnt know a tuned fork from a hole in the ground )
But as painfull as it is to the wallet ...spring rate is the first thing you have to do ,,,I avoided it for one whole season ,,,and eventually bit the bullet ,,,I should have done it straight away ...
I mean the Japs sell bikes to america ..but the spring emm to siut the home market ??? why??? profit on the aftersale spring????? I dont know ...
anyway ,,,I really must sit down soon and make a plan for this winters racing ,,,just been to busy ,,,,,,

Stephen

[HDTboy]

Speaking of shim stacks, 20c coins fit perfectly

[TwoSeven]

The cibby only has something like a 7.5 spring in it - its a standard spring for jap bikes (Have a look at the R1) - most westerners will probably use a 9.5 or 10.

It really only needs a 5, maybe a little bit more. 10 weight oil will make the bike bounce over bumps - it just wont react.

the 20 cent coins has nothing to do with shim stack. It just increases preload, but with a weak spring, wont do anything except raise the chance of blowing out the seals.

[texmo]

I am going to change the fork oil when I change my oil and filter I have already done 2,000kms so a service aint that far away and I would rather do it myself then pay some chum to do it...
I am probbly going to get a muffler later on rather than fuck the factory one thats on there now, I am lubing my chain once-twice a week that seems to be enough to keep it nice 'n wet, I have changed the perload on my rear shock its fine now but still pogos a little bit on bumpy corners maby im just expecting too much out of it....
I am also gonna look at getting some louder horns but I dont tend to use mine much, I have only gotten really angry twice once being today when a taxi drive hit me while changing lanes....

[Bonez]

I don't know about that, 10 weight oil is about $15-$20 (retail) per litre, you only need 375 mLs for each fork on a CBR250

Compared to $6-$10 for a ltr of ATF(retail k'mart and the like with usually some on special) and it works. Been using the stuff on my road bikes for the last 20 odd years.

[Unit:Me]

Just a few questions out there for the CBR guys....
I want my bike to be a bit louder, as a courier I want to be heard,

Any jobs going? Sounds too good riding a 'needs to be heard' bike for a job.

[texmo]

Any jobs going? Sounds too good riding a 'needs to be heard' bike for a job.

I dont understand you engrish very well.... but spend 50hours a week in the CBD and see how many people TRY and take you out... they have one successfull attempt on me so far..
Edit; oh and if you are serious about a job I can get you one no problems...

[Suney]

Hey texmo
I think I saw your bike last week, are with pace couriers? i can't remember
Did you deliver a package to university of auckland in grafton?
But is it really necessary to go so fast around uni?

[texmo]

I am with sub60 man what do you mean go so fast around uni? I have to go fast every where to earn my bread, I am the only red and blue cbr courier bike, I am guessing your talking about me riding around the courtyard out the front....