Thumper Club Forum
Club House => Chatter => Topic started by: welland99 on January 14, 2018, 08:14:47 AM
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Hi All,
I need a pair of rear shocks for my XBR pretty urgently to get it through the MOT. Does anybody have any useable ones they want to part with? Or, have you seen any particularly good deals offered recently anywhere?
I'm aiming to place an order in the next 24-48 hours in the hope that a delivery will arrive before next weekend.
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Aye welland99,
A link for your perusal! I bought Betor units from this supplier and I am pleased with them. I hope you find something suitable and would suggest that 2nd hand shocks could be a ...........! :'( :-X
Shock_Absorber_supplier (http://www.bike-revival.co.uk/page1.html)
My regards, Bill
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Hi Bill,
Yes, I agree about 2nd hand units. They would have to be from a trusted source and at an attractive price.
How do the dimensions work? Are the advertised lengths from centre to centre of the holes?
I took off my old (OEM) units yesterday, partly to check that there were no seized nuts / bolts, but also to check the dimensions.
By my measurements:
length is 315mm from centre to centre
top hole diameter is 14mm
bottom hole diameter is 10mm
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NJB have a good reputation and are a lot cheaper than Hagon. http://www.njbshocks.co.uk/#road
Run by a bloke with 20-odd years with Girling.
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NJB have a good reputation and are a lot cheaper than Hagon. http://www.njbshocks.co.uk/#road
Run by a bloke with 20-odd years with Girling.
That's an interesting link. Thanks. ;)
I'm not sure how many options there are for road use:
1) The classic shocks at £79 or the
2) street shocks (is that £189?)
Erm... I think that's it.
The classic shocks look appealing. Has anybody tried them - or any other njb model on the road?
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Aye welland99,
I used NJB shocks when buying replacements for the Morini 125H. These are non-adjustable and NJB fitted springs of a suitable rate for my weight and general riding style on the wee 'Morini the Minx'. They have performed well over the limited mileage that I have used the bike, and have handled all manner of A to Scottish un-classified road undulations! ;) The price was reasonable and the painted finish OK as is the chrome on the springs.
In my opinion NJB or Betor are perfectly adequate for day to day use on a range of road types. I used a set of Hagons on the Duke 450 single and they were leaking within 14 months of use, albeit daily use, but the 12 month 'warranty' had been passed and I have never used their products since. However, many Classic racers use Hagon products and find them fine, I would query their durability.
As for the length of the shock, convention is to measure the distance between the centre of the eyes at either end of the shock. The different mounting bolt diameters are accommodated using different bore rubber inserts and tubular steel inserts within the rubbers. If you choose to use the suppliers I suggested in my previous message, speak with them on the phone, with your specific requirements, the same with NJB and they can then give you a specific price for shocks set up to your specifications.
I hope this helps, my regards, Bill
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Thanks Bill.
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i put some YESS on my XBR and i am well pleased
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i put some YESS on my XBR and i am well pleased
Is that the same as YSS? Which model did you get?
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yes thems the ones Eco Twin Shock £174 on wemoto site
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I've ordered some classic road shocks from njb: exposed chrome springs over black body. Should have them by the weekend ;)
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I'm sure you'll let us know how they perform.....
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I'm sure you'll let us know how they perform.....
certainly will.
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..... but I'll start off with a visual comparison as they arrived today.
The new ones do look different:
1) the spring wire is thinner: it's 7.3mm on the old ones and 6.8mm on the new ones.
2) the outside diameter of the coils is smaller: 58.8mm on the old ones and 52mm on the new.
3) the springs are longer: the old ones are 190mm and the new ones are 225mm
4) they weigh less: each old one is 1917g, and each new one is 1352g.
I wonder how they will compare on the road?
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Bated breath........
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Generally speaking for coil springs.
Smaller wire diameter lower rate and potentially higher stress. but this depends on material quality.
Smaller mean spring diameter is higher rate.
Less number of coils per given length is higher rate.
Longer overall free length just means more overall movement but it's how many coils in that length which determine the rate.
If your springs are on the shock you'll not know the free length.
Summary.... ride it and see ;D ;D ;D
You can get a fair comparison, if you're that way inclined, by removing each spring and using a press to find the rate. Put weighing scales underneath.
Spring calculators are on tinternet now but you need to know the material spec.
Look forward to hearing your appraisal upon riding.
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Generally speaking for coil springs.
Smaller wire diameter lower rate and potentially higher stress. but this depends on material quality.
Smaller mean spring diameter is higher rate.
Less number of coils per given length is higher rate.
Longer overall free length just means more overall movement but it's how many coils in that length which determine the rate.
If your springs are on the shock you'll not know the free length.
Summary.... ride it and see ;D ;D ;D
You can get a fair comparison, if you're that way inclined, by removing each spring and using a press to find the rate. Put weighing scales underneath.
Spring calculators are on tinternet now but you need to know the material spec.
Look forward to hearing your appraisal upon riding.
thanks - very informative. however, as you said, there are too many variables and unknowns to predict how they will feel. One thing is for sure though, they are lighter!
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i went to fit them this afternoon. Alas, they wouldn't fit. the steel insert in the bottom bushes was too long for the aperture in the mounting fork. New inserts are in the post. Apologies have been given and accepted.
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Hello there
I have been using shocks from http://www.tecbikeparts.com who have a stand at both Stafford and Newark shows. I am on my second set. First lasted 3 yrs hard riding in all weather and on rough Lincolnshire roads which I didn't mind as they cost £45. I am still on my second set after 4 yrs (same price) and bought a spare pair a couple of years ago (still £45) along with a nice set of remote reservoir adjustable air shocks ( £80) both still on the shelf.
Nice people and very helpful. They also do some nice looking rearsets for a very reasonable price.
I will certainly carry on using them.
Cheers
Richard
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Hello there
I have been using shocks from http://www.tecbikeparts.com who have a stand at both Stafford and Newark shows. I am on my second set. First lasted 3 yrs hard riding in all weather and on rough Lincolnshire roads which I didn't mind as they cost £45. I am still on my second set after 4 yrs (same price) and bought a spare pair a couple of years ago (still £45) along with a nice set of remote reservoir adjustable air shocks ( £80) both still on the shelf.
Nice people and very helpful. They also do some nice looking re*******ts for a very reasonable price.
I will certainly carry on using them.
Cheers
Richard
Thanks. They look nice, but a week too late for me. Looks like the price has now gone up by £5, but still cheap. The worry with cheap things is that they are not very good, but a recommendation is very helpful.
Which ones will you fit next time? The spare ordinary set or the adjustable gas ones?
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Hello again
Sorry about being too late. A shame because they really are very good quality. I think they have them made for them.
I will fit the standard ones on my hack XBR and probably put the air ones on the slightly tidier one I am building (very slowly) or I might save them for the smart one I plan to build one day or maybe for the cut down track one I also have thoughts about. All pipe dreams really but you have to have them don't you.
Which ones did you fit in the end?
Cheers
Richard
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I bought the njb classic shocks in the end. The replacement bush sleeves arrived today, so I popped them in and then had both shocks fitted in about half an hour.
I only rode the bike briefly to the mot test, then home again (in the pouring rain, sigh), and i can honestly say that I could tell no difference from the old oil-less oem units. (I thought the old ones were fine - but the mot tester had another opinion)
I'll provide an update when I've used them a bit more.