The friendly "dumb" bike questions thread
Discussion
talksthetorque said:
Well done on not really crashing.
This! Nice work. I'd echo the sentiments to just replace the rubber seals. Had the same issue with my push-bike and that was all that was needed.To switch topics, anyone got a suggestion what to do with an old but usable lid? It's not really saleable as I dinked one of the spoilers on the back, plus it's a bit old, but still wearable for someone with a big enough head. I was looking for a charity project or something but couldn't find one. I might see if the riding school I learnt with could use it.
Krikkit said:
To switch topics, anyone got a suggestion what to do with an old but usable lid? It's not really saleable as I dinked one of the spoilers on the back, plus it's a bit old, but still wearable for someone with a big enough head. I was looking for a charity project or something but couldn't find one. I might see if the riding school I learnt with could use it.
I used to take my old lids to the fire/ambulance service so they could use them to practice cutting up/taking off/working with them etc.Dunno if it was any help to them, but they always thanked me and took them off my hands..
anonymous said:
[redacted]
The seal on the piston maybe, but surely the reservoir shouldn't ever be under pressure should it? I always assumed the piston sucked from the reservoir and pressurised the lines but the seal on the reservoir was designed to accommodate the volume changing but not take ay pressure. My rear reservoir's plastic.
If we're talking about the 'seal' on the reservoir of a bike master cylinder, then it's a bellows-style thingy and there is no expectation of pressure in the reservoir at all, above or below the 'seal'. Loads of cars don't have this bellows arrangement/'seal' and the reservoir just has a small vent hole on the top. But car's aren't expected to lean over or pull wheelies or stoppies etc (or fall over) so there no risk of fluid coming out the vent hole.
Bike reservoirs also have a vent hole (sometimes just a notch in the cover) so the reservoir contents are at normal air pressure, and all the 'seal' does is separate the fluid from the fresh air but the bellows arrangement can expand as the fluid level drops, and contract if it expands - it's just a barrier between the fluid and the air. If it's leaking under this 'seal' then either it's buggered or the lid wasn't screwed-down tight enough...but there's no pressure on either side of that 'seal'.
But there is also a seal (usually an o-ring) on the master cylinder itself, and that will be under big pressure when braking, but here the fluid's going to be coming out the cylinder itself and not the reservoir.
Bike reservoirs also have a vent hole (sometimes just a notch in the cover) so the reservoir contents are at normal air pressure, and all the 'seal' does is separate the fluid from the fresh air but the bellows arrangement can expand as the fluid level drops, and contract if it expands - it's just a barrier between the fluid and the air. If it's leaking under this 'seal' then either it's buggered or the lid wasn't screwed-down tight enough...but there's no pressure on either side of that 'seal'.
But there is also a seal (usually an o-ring) on the master cylinder itself, and that will be under big pressure when braking, but here the fluid's going to be coming out the cylinder itself and not the reservoir.
Low Pro said:
Can I ride on the North or south circular with L plates? Moving to London, passed the CBT and Theory just need some practice before DAS.
You can, but I’d not recommend the fast bits of the North one unless your bike can comfortably do 60mph.Much of the South Circular is residential streets, so manageable on anything at all.
ZetecTDCI said:
Suspect cost has a lot to do with it. The honda cbx750 had hydraulic tappets iirc.
Indeed it did.I have a 1986 CB700 Nighthawk, which has a de-stroked CBX motor and retains the hydraulic tappets.
It also has a shaft drive, so there really is very little by way of routine maintenance.
A couple o friendly dumb questions for the more knowledgable amongst us.
1, Will noise cancelling inner ear headphones work to counteract wind noise?
2, I'm an "All the gear all the time" type of rider, but sometimes I'd like to go out in jeans and throw something protective over the top so I can take them off at the other end. Question is....Is it just a case of ordering something a few sizes larger so it'll go over the top of jeans or are there effective protective "overgarments"? If so, how does the sizing work? i.e. if I was say a 34 waist would I order a 34 or go larger?
Cheers all
1, Will noise cancelling inner ear headphones work to counteract wind noise?
2, I'm an "All the gear all the time" type of rider, but sometimes I'd like to go out in jeans and throw something protective over the top so I can take them off at the other end. Question is....Is it just a case of ordering something a few sizes larger so it'll go over the top of jeans or are there effective protective "overgarments"? If so, how does the sizing work? i.e. if I was say a 34 waist would I order a 34 or go larger?
Cheers all
Amused2death said:
A couple o friendly dumb questions for the more knowledgable amongst us.
1, Will noise cancelling inner ear headphones work to counteract wind noise?
2, I'm an "All the gear all the time" type of rider, but sometimes I'd like to go out in jeans and throw something protective over the top so I can take them off at the other end. Question is....Is it just a case of ordering something a few sizes larger so it'll go over the top of jeans or are there effective protective "overgarments"? If so, how does the sizing work? i.e. if I was say a 34 waist would I order a 34 or go larger?
Cheers all
1. I've just bought some earbuds with noise cancellation, however, i\ve also just knackered my knee so don't want to get out on the bike yet.1, Will noise cancelling inner ear headphones work to counteract wind noise?
2, I'm an "All the gear all the time" type of rider, but sometimes I'd like to go out in jeans and throw something protective over the top so I can take them off at the other end. Question is....Is it just a case of ordering something a few sizes larger so it'll go over the top of jeans or are there effective protective "overgarments"? If so, how does the sizing work? i.e. if I was say a 34 waist would I order a 34 or go larger?
Cheers all
One thing I have noticed is on a train they are not as effective at noise cancellation as foam insert plugs.
I use them for work, so you can still hear what you need to, and drown out the damaging repetitive noise of machines and high volume extraction units. And for this they are decent, if they work OK on the bike then it's a bonus.
2. You can buy Kevlar jeans that look like normal-ish jeans. I'd think footwear is more of a problem than trousers if you want to go "out-out"
Amused2death said:
2, I'm an "All the gear all the time" type of rider, but sometimes I'd like to go out in jeans and throw something protective over the top so I can take them off at the other end. Question is....Is it just a case of ordering something a few sizes larger so it'll go over the top of jeans or are there effective protective "overgarments"? If so, how does the sizing work? i.e. if I was say a 34 waist would I order a 34 or go larger?
Cheers all
I have textiles which are loose enough to comfortably stick trousers on with them as they have zip in liners. But they're also not too big to make me look like a tit.Cheers all
I could probably put a sensible pair of jeans under my leathers but I wouldn't go very far.
talksthetorque said:
2. You can buy Kevlar jeans that look like normal-ish jeans. I'd think footwear is more of a problem than trousers if you want to go "out-out"
I have a pair of Bull-it single layer kevlar jeans and for all intents and purposes are exactly like a normal pair of jeans to look at and wear. I havent crashed in them yet though so can't vouch for how well the stand up to a crash, but I believe they onenof the higher 'protection'??? Ratings that you can get. Footwear wise I have a set of TCX goretex plimsole thingys which have some fancy Dan footbed and D30 ankle protection. They look pretty much like a pair of leather Converse or similar.
I've got a pair of part lined jeans with knee and hip pads in, plus textile trousers also with pads in, but these fit well and I can't get anything on underneath them.
I was wondering about wearing ordinary jeans then having something protective with pads over the top of the jeans.
Cheers for your thoughts.
I was wondering about wearing ordinary jeans then having something protective with pads over the top of the jeans.
Cheers for your thoughts.
I used to use a pair of Alpinestar textile overtrousers that worked as you ask, they had a big zip down each leg and it took seconds to put them on over a pair of jeans or trousers, really handy for commuting. I used them for yonks but now they've been kept for dog walking when it's chucking it so I'll take the armour out.
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