Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - onethumb

Pages: 1 [2] 3 4 ... 23
16
CB750 / Re: Compression numbers.
« on: April 10, 2017, 09:28:13 PM »
Yep I hear that.  I don't want to take it out again. Although I've got a good system now and can drop a head in 15 minutes. Bet trigger can do it in 5!


Sent from my iPad using Tapatalk

17
CB750 / Re: Compression numbers.
« on: April 10, 2017, 09:20:09 PM »
If you're talking about the little rubber sleeves that fit round the dowels, F2 engines should only use 4, seems like your gasket kit was generic aftermarket, as F1's and K7's use all 8.
Yep hairygit I did use 8. So it's just the 4 that go on the pins that I need then? When I stripped it the other build had used 8. Reading the link that Yozzer pinned I'm thinking of ditching all 4/8.
Any thoughts. .?


Sent from my iPad using Tapatalk

18
CB750 / Re: Compression numbers.
« on: April 10, 2017, 08:43:17 PM »
Thanks dude just read it. I'll be doing some checking tomorrow.
Has anyone else left the 8 rubber seals/washers out.


Sent from my iPad using Tapatalk

19
CB750 / Re: Compression numbers.
« on: April 10, 2017, 07:41:54 PM »
Thanks.
The pins are flush the rubbers sit high though.


Sent from my iPad using Tapatalk

20
CB750 / Re: Compression numbers.
« on: April 10, 2017, 07:16:27 PM »
Yozzer have you got a part number for the gasket as I can't find them on the site? Thanks


Sent from my iPad using Tapatalk

21
CB750 / Re: Compression numbers.
« on: April 10, 2017, 06:19:00 PM »
And David silvers has got 2 genuine head gaskets in stock for the F2
Has he. I'm on the net.
Thanks dude.


Sent from my iPad using Tapatalk

22
CB750 / Re: Compression numbers.
« on: April 10, 2017, 06:17:53 PM »
The 4 notch pins that the rubber seals go round are  they sitting lower than the gasket ?? Just a thought .
Hi Yozzer, I had them seated level with the top of the pins then pushed in to the hole till they bottomed out. Does that sound right? Those rubbers are not the best design I've ever seen.



Sent from my iPad using Tapatalk

23
CB750 / Re: Compression numbers.
« on: April 09, 2017, 07:30:28 PM »
Nope. On the f2 you can't. Luckily for me.


Sent from my iPad using Tapatalk

24
CB750 / Re: Compression numbers.
« on: April 09, 2017, 07:06:42 PM »
Hi trigger. No the bores were really good. But I've just took it all apart and you can see that the new gasket has not sealed around 3-2-1. Has any one else had issues with the gasket kit from DS. Any recommendations for a new head gasket?


Sent from my iPhone using Tapatalk

25
CB750 / Re: Compression numbers.
« on: April 09, 2017, 12:21:47 PM »
Well trigger you were right. So the head went to the shop and he found pitting on number 1 along with a bent valve and two of the exhaust guides were gone. So it's been machined, new guides a new valve and the seats and valves re cut. Looks amazing.
Now the issue is: I've built the engine back and have done a test before putting it back in the frame and the numbers are weird. So before I was getting 1-4 40-150-150-125 now I'm getting 1-4 110-110-115-125. No plugs no carbs and a squirt of thin oil in the bores.
I did notice that the new head gasket that was from DS sat a little funny when on but flattened with the head in place. Could this be the issue? I'm getting a bit stressed over this. Help please.



Sent from my iPhone using Tapatalk

26
CB750 / Re: Clutch cable
« on: March 04, 2017, 08:55:14 AM »
I'll check that out. Thanks.
Venhill stuff is amazing quality, I had them make up new throttle cables to marry to one of their push pull throttles. 


Sent from my iPad using Tapatalk

27
CB750 / Clutch cable
« on: March 04, 2017, 08:07:03 AM »
Hi, while my bike is in bits again I am going to replace the clutch cable as it's a bit tight. This is due to using slightly higher and longer bars. Can anyone recommend a direct replacement that is a 50mm longer?
Thanks.


Sent from my iPad using Tapatalk

28
CB750 / Re: Taking engine out burning oil
« on: March 02, 2017, 10:46:57 PM »
What mark said. I know it's not a big help but I just did mine last week (I was a few hrs from turning it over when I found the issue) in just under three hours. Removed the lot then lifted the frame off the engine. On my own! I've got no friends.


Sent from my iPad using Tapatalk

29
CB750 / Re: Taking engine out burning oil
« on: March 02, 2017, 04:45:14 PM »
Dude proper gutted for you, I know exactly how that feels.


Sent from my iPad using Tapatalk

30
CB750 / Re: Compression numbers.
« on: February 28, 2017, 12:18:38 PM »
Thanks trigger and mrdavo for the input. I'll leave it to the engineers to give me more info on what to do with the reconditioning.


Sent from my iPad using Tapatalk

Pages: 1 [2] 3 4 ... 23
SimplePortal 2.3.5 © 2008-2012, SimplePortal