Author Topic: DT1 GYT Cylinder  (Read 4636 times)

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Offline William Doe

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Its only old bike racing FFS get over yourselves





The Artist formerly known as TM Bill

Offline OverTheHill

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Re: DT1 GYT Cylinder
« Reply #1 on: December 31, 2015, 07:49:44 am »

Offline Lozza

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Re: DT1 GYT Cylinder
« Reply #2 on: December 31, 2015, 07:33:38 pm »
"Sleeving" should be shot at dawn for suggesting that. :(
Jesus only loves two strokes

Offline micks

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Re: DT1 GYT Cylinder
« Reply #3 on: December 31, 2015, 08:29:00 pm »
aren`t tz barrels chrome you can get them rechrome`d  why not this

Offline OverTheHill

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Re: DT1 GYT Cylinder
« Reply #4 on: December 31, 2015, 08:44:03 pm »
"Sleeving" should be shot at dawn for suggesting that. :(
Yep, tis mine up there lol. I've been shot at dawn 'that often' they've run outa bullets.  Had another cylinder that suffered the same fate early on, not 45 years later, & had--had an LA sleeve fitted by the local machine shop. [think it was my bosses original; GYT cylinder]. The sleeve had a bridged exhaust port & in my wisdom in the late "70's i cut the bridge out which made a huge exhaust port. Saw lots of use then rested till the advent of vmx then carried on till the piston let go above the ring on the exhaust side [just broke]. New piston kit & it carried on till i sold it recently. That sleeve--the rear most transfers were cut so the bottom was a lot lower than original [lozza?--why would that be]. Never did get matched up. Exhaust [sleeve] port was wider than the cylinder outlet original. Think that got matched up. Was no support behind the bridge [that i butchered] but was quite thick. The liner was made out of what seemed very hard material & lasted well. was on .25 which is how i received it in the "70's & was still on that size or is still on it now. Was using DT1MX piston kits being oversize. Cheers.
ps, Lozza will love this--this cylinder, back in the day of bloody expensive pistons, the machine shop used to micropeine [spelling] the piston to bring it up tight & they even gnurled [more spelling] them for a time. Everything worked in the short term. Happy new year [what's bloody happy about it!!].

Offline OverTheHill

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Re: DT1 GYT Cylinder
« Reply #5 on: December 31, 2015, 08:48:39 pm »
aren`t tz barrels chrome you can get them rechrome`d  why not this

I'd be happy to see it re-chromed or Nikasil'd. Just won't be me having it done. Think i'll re-write the add lol.

Offline Lozza

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Re: DT1 GYT Cylinder
« Reply #6 on: January 01, 2016, 02:23:51 pm »
"Sleeving" should be shot at dawn for suggesting that. :(
Yep, tis mine up there lol. I've been shot at dawn 'that often' they've run outa bullets.  Had another cylinder that suffered the same fate early on, not 45 years later, & had--had an LA sleeve fitted by the local machine shop. [think it was my bosses original; GYT cylinder]. The sleeve had a bridged exhaust port & in my wisdom in the late "70's i cut the bridge out which made a huge exhaust port. Saw lots of use then rested till the advent of vmx then carried on till the piston let go above the ring on the exhaust side [just broke]. New piston kit & it carried on till i sold it recently. That sleeve--the rear most transfers were cut so the bottom was a lot lower than original [lozza?--why would that be]. Never did get matched up. Exhaust [sleeve] port was wider than the cylinder outlet original. Think that got matched up. Was no support behind the bridge [that i butchered] but was quite thick. The liner was made out of what seemed very hard material & lasted well. was on .25 which is how i received it in the "70's & was still on that size or is still on it now. Was using DT1MX piston kits being oversize. Cheers.
ps, Lozza will love this--this cylinder, back in the day of bloody expensive pistons, the machine shop used to micropeine [spelling] the piston to bring it up tight & they even gnurled [more spelling] them for a time. Everything worked in the short term. Happy new year [what's bloody happy about it!!].

How about in the arse with rock salt then Morley :)

The lower transfer is arse about , that is used on 102mm bore centre twins with shite transfer ports/ Nobody knows why it works but it does.
Sleeving that cylinder will just make it a DT cylinder.
Jesus only loves two strokes

Offline OverTheHill

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Re: DT1 GYT Cylinder
« Reply #7 on: January 02, 2016, 11:16:25 am »
I can stand pain!! [till it hurts]. The lower transfers were just a lot lower at the bottom. Top was same height as original [incase i said that wrong]. Yeah chrome--loved that cylinder as it never dropped off being sharp on power right to the end of the race where my DT1MX [original] cast cylinder bore just looses the sharpness of power when hot. Maybe a rebore might improve that fact. DT1MX cylinders seemed to wear out fast like they were crappy cast or something but 'that' La sleeve lasted very well & seemed hard 'as' the hobbs of hell [etc].

Offline sleepy

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Re: DT1 GYT Cylinder
« Reply #8 on: January 02, 2016, 05:11:16 pm »
I have 2 of those cylinder here one has the original chrome and the other a sleeve that I made and fitted and the sleeved one goes a lot better than the chromed job and doesn't drop off when hot either.

Offline OverTheHill

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Re: DT1 GYT Cylinder
« Reply #9 on: January 06, 2016, 08:47:16 am »
I have 2 of those cylinder here one has the original chrome and the other a sleeve that I made and fitted and the sleeved one goes a lot better than the chromed job and doesn't drop off when hot either.

That's good to hear. [not dropping off power]. I liked that LA sleeve liner'd cylinder. Guy i sold 'that' to a while ago just rang this morning to say he fitted the motor i had it on--into a DT3 with a bassani pipe [i think he said] & it fair goes like hell--as it should.