removing valve springs

[jamesrs250]

any one know know how to remove the valve springs on a dzr 400

i found this vid on you tube just cant get the keepers to go back in

https://www.youtube.com/watch?v=es6raocApZQ

[Fizzer Thou]

You will need to compress the valve springs sufficiently that you can remove the split collets.

On reassembly place the split collets either side of the top of the valve using a blob of grease to hold them in place while you ease off the tension on the valve springs.

I have a very old valve spring compressor that I have had for over 35 years.But the physical size of valve springs has got considerably smaller to the big springs on my Honda 750 in 1979.So for my Exup 1000 valves I made an adapter from a length of old Renthal handlebar that I had lying around the shed.
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Just talk bikes.What else is there?

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[jamesrs250]

i was thinking that i could try and use a g-clamp

[Fizzer Thou]

One end of the valve spring compressor normally has a pointed end to it.This centres itself in the middle of the valve head inside of the combustion chamber.A G clamp has not got this feature.
____________________
Just talk bikes.What else is there?

Always have a 'Plan B'

[jamesrs250]

yeah mabe if i cut the end of the g clamp with the thread on to sit in the middel of the valve. the the other end i would have to do some think so i could get the keekers in

[el_oso]

i done it like the guy in the video using a spark plug socket. i was able to do it with a fridge magnet. took a little while to get the method ok, but was easy enough in the end. think i used blue tac first which did work before i found a magnet.
using a g-clamp is probably not the right way to go, chances are the g-clamp will not have enough clearance over the cylinder head and/or you need an opposite parallel and flat surface to push down on to compress the valve spring.
get someone to help you put them back in, it is so much unbelievably easier with an extra pair of hands, sometimes i wish evolution would hurry up and give me an extra pair of limbs
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Duke 390
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[MickC]

I got one of these when I did my head:

https://www.ebay.co.uk/itm/Valve-Spring-Compressor-Kit-small-bores-Motor-cycle-/120750509923?pt=UK_Hand_Tools_Equipment&hash=item1c1d4a8f63

Don't know if it would be suitable for your valves, but if it is, they are well worth it. They can be adjusted at both ends, so you can easily keep them away from the surfaces of the head.
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[jamesrs250]

the method on you tube does work i just can get the keepers back on i can get one on

[jamesrs250]

[spyuggy]

If you study the video, the guy puts one in, then lines up the second one at an angle, his angle was about 45 degrees, make sure that you have a side clearance on either side and it will slip in easily.
I have done heads when I had little tools and used two screwdrivers to compress the spring, then a mate dropped in both collets with his fingers, or pointed nosed pliers.
Best of luck with it.
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Treat each day as if it was your last, because one day you will be right.

[MickC]

[Pete.]

A spring compressor is the proper way, as above some need an adaptor making as they are nearly always made for car-sized valves. You can actually make them from a large open-frame G-clamp becaus eI have a very old one made to that design.

Do you not know anyone who could lend you one?
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[jamesrs250]

[jamesrs250]

i dont know any one ho could lend me one but the shop wanted £45 to do it..i might just buy one of theese then

https://www.ebay.co.uk/itm/230673491182?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

[MickC]

[Fizzer Thou]

My valve spring compressor cost me £5 back in 1976.But looking at the adaptors in that kit from ebay,they are just like what I hand made from various bits of tubing that I had in the shed.

If the cylinder head on the DRZ is anything like the head from an Exup or R1,then the inverted bucket tunnel is very narrow and the wrong shaped/sized adapter must not be allowed to damage this finely honed part of the head.
____________________
Just talk bikes.What else is there?

Always have a 'Plan B'