09-15-2007, 09:02 PM #1
cylinder question gp1200r big bore
i have a bigbore cylinder and you know the 3 metal tabs on the bottom of the cylinder that goes into the upper case..... 2 little ones and 1 long 1. well 1 of the little ones broke off is this bad? i didnt bang it, drop it, nothing im guessing it probably happened in transit. heres the pictures please tell me i can still use it or its cheap to fix
09-18-2007, 12:15 PM #2
09-18-2007, 03:43 PM #3
Those stabilize the piston at BDC. Without them you will not have piston control and not live long if at all. By the time you weld it, remachine everything, along with the renick you could probably just start over with a new jug and be better off.
09-18-2007, 04:30 PM #4
Duke is right.
Don't use that jug.
The bottom of the cyl sleeve controls piston side thrust @ bdc.
With one ear broken off, the side thrust will rock the piston and cause premature wear that could lead to a piston failure very quickly imo.
Maybe Kerry will replace it... or was the package insured?
09-18-2007, 07:06 PM #5
thanks for the great news guys package was insured the only problem was i got it right before i left to go away. i unpacked it threw the box and packing out. when i returned home after a week i actually saw the little metal piece laying on the floor and started looking at all my cylinders and saw it broken off the 1. so i have had it now 2 weeks and without packing insurance is worthless
09-18-2007, 08:54 PM #6
had the same issue with a cylinder i had done from lowell a few years ago...ups paid the claim 100%.
my 90's using 1200 jugs we weld the ears closed like a 1300 cylinder to elliminate the possibility of an ear dropping..i was more concerned about one failing in use taking out the entire motor...so thats why i choose to weld em up...at the time 1300 jugs where not an option for me.
09-18-2007, 09:11 PM #7
Exactly what Duke said,the BDC would be a little wobbley.
09-18-2007, 10:58 PM #8
how would i go about the claim if i threw the box and packing away and it was 2 weeks ago when i received it? im about $1,500 over budget and do not have another 400$ to spend on another cylinder right now. if i cant claim insurance im probably going to put it in and if i can get 5 runs out of it fix it next season or just blow the whole damn stupid ski up!
Is it possible to just weld the back of it to give it some strenght or is that a nono?
Last edited by spyder3000gtvr4; 09-18-2007 at 11:00 PM.
09-18-2007, 11:37 PM #9
09-18-2007, 11:39 PM #10
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