Hello Guest User,

Please feel free to have a look around the forum but be aware that as an unregistered guest you can't see all of it and you can't post.

To access these 'Registered Users Only' areas simply register and login.

Lawson Jigsaw Project

Work in Progress

Moderators: KeithZ1R, chrisu, paul doran, Taffus

Message
Author
User avatar
z1000puddin
Custard Cream
Custard Cream
Posts: 886
Joined: 23rd Jul 2011
Location: Aberdeen,Dyce

Re: Lawson Jigsaw Project

#76 PostAuthor: z1000puddin » Thu Jul 12, 2018 6:54 am

Can anyone identify the pistons ?
The numbers dont seem to be Wiseco
Attachments
IMG_1206.JPG
IMG_1206.JPG (105.19 KiB) Viewed 714 times
IMG_1203.JPG
IMG_1203.JPG (100.11 KiB) Viewed 714 times
IMG_1202.JPG
IMG_1202.JPG (63.97 KiB) Viewed 714 times
Zed til Dead

User avatar
paul doran
Area Rep.
Area Rep.
Posts: 8476
Joined: 24th Sep 2004
Location: near Dublin Ireland

Re: Lawson Jigsaw Project

#77 PostAuthor: paul doran » Sun Jul 22, 2018 4:14 pm

Stuart
shims are under bucket on unitrack heads so it is correct
unusual to see broken shims
I had a smashed shim on a Z1 engine recently and a badly fitting bucket caused it
it would not compress when cam lobe struck it so something had to give and the shim shattered
way too many Zeds

User avatar
Kwackman
100Club
100Club
Posts: 180
Joined: 13th Nov 2009
Location: Belfast

Re: Lawson Jigsaw Project

#78 PostAuthor: Kwackman » Mon Jul 23, 2018 11:51 am

paul doran wrote:unusual to see broken shims


I read somewhere (maybe on this forum?) that some people ground old shims down to a smaller size rather than buying new ones, and this was likely to effect their "hardness" and cause them to break.
Could be the cause, or an old wive's tale?!
2006 ZRX1200R
1982 Z400J project

ex owner of Z1100R
GXI 2752 are you out there?

User avatar
swampy
Custard Cream
Custard Cream
Posts: 593
Joined: 10th Jan 2016
Location: Croydon

Re: Lawson Jigsaw Project

#79 PostAuthor: swampy » Mon Dec 24, 2018 9:43 am

I had a similar problem on my ELR, the stripped threads were over come by getting an engineering co. to install brass/bronze stud then mill flat and driil and tap to m6.

The lack of compression on mine was turned out to be partly down to a cracked valve guide, all guides then got replaced and head rebuilt with HD A.P.E springs as it gives me the optiom of hotter cams in future if i desire or deemed needed.
Motor biking, motor biking, going down the queens highway like a rasher streaky bacon!

chrisw1
100Club
100Club
Posts: 291
Joined: 13th Mar 2017
Location: Oswaldtwistle

Re: Lawson Jigsaw Project

#80 PostAuthor: chrisw1 » Mon Dec 24, 2018 7:48 pm

Just a thought ..... have they used the correct valve spring retainers for the shim under bucket ?
I believe they are different to the shim over bucket ones and maybe that broke the shims
I will stand corrected if that is not the case that they are different


Return to “Projects”

Who is online

Users browsing this forum: No registered users and 3 guests