//ArrowChat Code
Page 5 of 8 FirstFirst ... 3 4 5 6 7 ... LastLast
Results 61 to 75 of 120

Thread: Tri-Z Engines

  1. #61
    Join Date
    Mar 2017
    Location
    Antrim county, MI
    --
    53
    Check your cylinder base gasket surface for warpage. I had a guy at the last shop I worked at lay a patch of weld over the 2nd boost port area, it warped the corner of the gasket surface up .025in. Pretty sure it would snap off if torqued down like that.

  2. #62
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Quote Originally Posted by bobtdms View Post
    Check your cylinder base gasket surface for warpage. I had a guy at the last shop I worked at lay a patch of weld over the 2nd boost port area, it warped the corner of the gasket surface up .025in. Pretty sure it would snap off if torqued down like that.
    Good point for anyone reading this. I forgot to mention that I had the shop take .002” off the top and bottom of the cylinder to be safe.

    I always lap the cases, cylinder and head on these because they are seldom flat in my experience and like the man said, welding can warp them.

  3. #63
    BarnBoy is offline Just Too Addicted Arm chair racerJust too addicted
    Join Date
    Jun 2015
    Location
    Oklahoma
    --
    731
    Are you going to lap it, or use heat to clamp and straighten?

    Thats kinda a BS deal, I've never had any luck with the aluminum arc welding. I think it puts a ton of extra heat into the work that is not necessary. But you had a bunch of welding that needed to be done...hard to avoid. Anyhow, looks good. Once you get that taken care of you should be in business.
    1984 HONDA ATC200M - OG, mid-restoration
    1981 HONDA ATC200 - future build
    1981 HONDA ATC185S - parts
    1984 ATC200X - roller, future build
    1984 Honda ATC250r - in a million pieces- ISO grab bar, PM if you have one

    Da velder
    _______________________________________________
    Feedback:
    http://www.3wheelerworld.com/showthr...ck-for-Barnboy

  4. #64
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Quote Originally Posted by BarnBoy View Post
    Are you going to lap it, or use heat to clamp and straighten?

    Thats kinda a BS deal, I've never had any luck with the aluminum arc welding. I think it puts a ton of extra heat into the work that is not necessary. But you had a bunch of welding that needed to be done...hard to avoid. Anyhow, looks good. Once you get that taken care of you should be in business.
    I cleaned up the welds as much as I’m going to and bolted it down to a case half tonight. Then I heated it up as hot as I could get it with a heat gun and then took a propane torch to the welds and gussets in the area where it’s warped. After it cooled off I unbolted it and it looks like I gained about 015” of an inch, which is not enough, so tomorrow I’m going to take it to where I have my oxyacetylene set and put some real heat to it in a couple of strategic points. If I can get it close i’ll have it milled and then run two gaskets.

    Click image for larger version. 

Name:	F00A6F2A-95C4-4F43-884B-5753F6289628.jpeg 
Views:	19 
Size:	147.9 KB 
ID:	266458

    Click image for larger version. 

Name:	6CBB4852-D0FF-4D4B-98C5-47BB854B728A.jpeg 
Views:	20 
Size:	195.0 KB 
ID:	266459
    Last edited by El Camexican; 01-31-2021 at 11:40 PM.

  5. #65
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Machinist took care of the cover and the cylinder I was originally planning to use. Changed the thread title because I’ve got three different builds happening at the same time as well as so some other Tri Z related stuff.

    Using the kickstarter and water pump cover surfaces as clamping points the cover cleaned up with a .037” removed off the highest point. The Versa gaskets I have are .019” thick, so I’ll probably need to run 2 or 3 of them to compensate.

    Click image for larger version. 

Name:	53265D52-E105-486D-B660-ADD7D541D6EB.jpeg 
Views:	22 
Size:	184.4 KB 
ID:	266481

    Click image for larger version. 

Name:	3744E6ED-AB4B-41D6-86BA-1C77BB3D483F.jpeg 
Views:	18 
Size:	135.0 KB 
ID:	266482
    It sucks to get old

  6. #66
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    This is the cylinder that was for the original build plan. I’ll probably just finish it up and stick it in a box unless I luck into another bottom end.

    It’s got a one-off LA Sleeve in it. 68mm stock bore with a bridged exhaust port. It’s also been welded to accept a second boost port. Had the machinist drop an end mill in to allow the stud nut a clean path. Plans to epoxy and blend to make it invisible to all but the the most observant Tri Z aficionado. Had to take .005” off the base to flatten it. I’ll post photos when all the port work is done.

    Click image for larger version. 

Name:	91BEF6EE-7B22-4893-842F-EF3591963B10.jpeg 
Views:	17 
Size:	88.1 KB 
ID:	266483

    Click image for larger version. 

Name:	1257E6AD-59D4-4497-B385-073E55E67E1C.jpeg 
Views:	13 
Size:	99.7 KB 
ID:	266484

    Click image for larger version. 

Name:	1B96AD46-E0E6-45FA-B35A-CB40F1FDDCC7.jpeg 
Views:	12 
Size:	95.0 KB 
ID:	266485

    Click image for larger version. 

Name:	A54A48AD-D025-49EC-B4BB-75B2199F0AC5.jpeg 
Views:	13 
Size:	117.1 KB 
ID:	266486

    Click image for larger version. 

Name:	5E17B33C-77A6-49D9-BE57-6FF184B8FAEC.jpeg 
Views:	19 
Size:	128.4 KB 
ID:	266488

    Click image for larger version. 

Name:	903DF915-97D1-4E83-8A74-B4E0577F3E42.jpeg 
Views:	20 
Size:	128.0 KB 
ID:	266487
    It sucks to get old

  7. #67
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Fired up my nasty blast cabinet and spent most of the morning cleaning up two engine covers Jedi style using only the Force to guide me because I can’t see anything through the window.

    Click image for larger version. 

Name:	E0549C57-1D4F-4519-AE44-12BD0DE12B2D.jpeg 
Views:	14 
Size:	144.1 KB 
ID:	266615

    Click image for larger version. 

Name:	372D4625-C8AB-4551-9844-535F50B7AB28.jpeg 
Views:	14 
Size:	132.6 KB 
ID:	266611

    Click image for larger version. 

Name:	78CA449A-32DC-47DD-92C4-3A96353F991B.jpeg 
Views:	19 
Size:	177.4 KB 
ID:	266612

    Click image for larger version. 

Name:	5D0757AD-8466-4382-8716-16B9A903D058.jpeg 
Views:	12 
Size:	145.2 KB 
ID:	266613

    Click image for larger version. 

Name:	C7D195B0-9286-4952-BBAB-A1972196B190.jpeg 
Views:	17 
Size:	160.5 KB 
ID:	266614

    This particular cover (the nasty looking black one in the first photo) is mint aside of a couple tiny scuffs that you have to look for. There aren’t even any scoring marks around the mounting holes caused by over tightening. I didn’t remember buying it until a few days ago when I found it in a parts box.

    Going to pack this one up in a carton box and hope I never need to use it.
    It sucks to get old

  8. #68
    Join Date
    Jul 2010
    Location
    Arkansas
    --
    2,196
    Yum! Spare Parts!


    I hear ya on the window. I just had a new one cut for mine a few days ago. I've got the stick-on plastic protectors, but the last one didn't stick so well, and eventually the glass got to the point I didn't care, until it was so bad I couldn't hardly see.

    $13 and change to have a new one cut in a few minutes. It's going to feel like a new cabinet.
    The story of three wheels and a man...

  9. #69
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    On a scale of one to fugly it’s a solid nine, but it’s done.

    Click image for larger version. 

Name:	CD3F9671-C19D-413D-8FA3-C6E3FA204944.jpeg 
Views:	20 
Size:	200.3 KB 
ID:	266650

    Click image for larger version. 

Name:	16039AD3-926A-42A5-94AF-0A94E6E99014.jpeg 
Views:	23 
Size:	178.1 KB 
ID:	266651

    Click image for larger version. 

Name:	FBABBBBF-4128-4171-BA12-0A81FA79E39F.jpeg 
Views:	20 
Size:	141.4 KB 
ID:	266652

    Click image for larger version. 

Name:	B198A431-6275-4D9C-9DDD-E0C96E925A38.jpeg 
Views:	20 
Size:	151.4 KB 
ID:	266653

    Click image for larger version. 

Name:	DFFD8E34-8F42-4446-9E0F-A7F8D1118A03.jpeg 
Views:	18 
Size:	84.6 KB 
ID:	266654

    Filled in the void below the area where the kicker plate bolts on with epoxy, A to cover up some nasty welds and B because it looks like an area that could use a little extra support.

    I think this is the one that will go on the PV engine.
    It sucks to get old

  10. #70
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Interesting..... just got a photo from my Laredo mail guy.... I wonder what that could be

    Click image for larger version. 

Name:	4CAD5992-D013-4907-BB88-24027A4D6418.jpg 
Views:	20 
Size:	99.0 KB 
ID:	266655
    It sucks to get old

  11. #71
    Join Date
    May 2006
    Location
    The Open Road
    --
    4,729
    It's go-fast stickers

    Those stickers and a boost bottle are good for 1.5 extra ponies

  12. #72
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Painted another spare cover last night and put together the one I plan to use for the PV engine.

    Click image for larger version. 

Name:	C2864103-6B17-48B5-951D-77EA5EB54244.jpeg 
Views:	23 
Size:	297.4 KB 
ID:	266682

    Click image for larger version. 

Name:	68F4077D-F8C7-4DC1-BBC4-21427EB5CCEE.jpeg 
Views:	16 
Size:	248.7 KB 
ID:	266678

    Sprock SS impeller

    Click image for larger version. 

Name:	678C92A1-D6D7-4609-BA37-CDAA98D752AC.jpeg 
Views:	15 
Size:	216.4 KB 
ID:	266679

    PV governor assembly

    Click image for larger version. 

Name:	55B778E9-0F56-4AD4-8C4B-33F1CFEE4115.jpeg 
Views:	14 
Size:	234.4 KB 
ID:	266680

    Click image for larger version. 

Name:	2AE83988-07EA-43A5-907D-17FF2CCE508D.jpeg 
Views:	15 
Size:	198.5 KB 
ID:	266681

    To add PV to the Tri-Z cover you just need to knock out the steel plug and insert a seal that should be included in any seal kit that claims to fit both the YZ250 and the Tri-Z. When you consider the added cost to incorporate this feature into the Tri-Z cover it seems likely that an 87 Tri-Z would have come from the factory with a power valve.
    Last edited by El Camexican; 02-14-2021 at 02:10 AM.
    It sucks to get old

  13. #73
    Join Date
    Jul 2010
    Location
    Arkansas
    --
    2,196
    Quote Originally Posted by El Camexican View Post
    When you consider the added cost to incorporate this feature into the Tri-Z cover it seems likely that an 87 Tri-Z would have come from the factory with a power valve.
    You're telling us, that if production wouldn't have been forced to cease, they would have continued to improve?

    This 'cease production' has lasted longer than most ceasefires.
    The story of three wheels and a man...

  14. #74
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Quote Originally Posted by ATC King View Post
    You're telling us, that if production wouldn't have been forced to cease, they would have continued to improve?

    This 'cease production' has lasted longer than most ceasefires.
    Everything would have continued to be improved with the exception of the Tecate which was perfected by professional racer, engineer, and former member Barnett468 prior to the ban.
    It sucks to get old

  15. #75
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Off with the old....

    Click image for larger version. 

Name:	0AF3F29E-2D4B-4373-BF83-E56B29A2CEB8.jpeg 
Views:	8 
Size:	115.4 KB 
ID:	267021

    Click image for larger version. 

Name:	297F5D80-B3B6-4D76-AA05-589B6A654EC9.jpeg 
Views:	10 
Size:	220.5 KB 
ID:	267022

    ...and on with the new.

    Click image for larger version. 

Name:	B47431D5-E3A0-48E8-82DB-952BF2633245.jpeg 
Views:	12 
Size:	212.9 KB 
ID:	267023

    Click image for larger version. 

Name:	CBDFFDCA-FAEE-401C-B55E-F5B81279F772.jpeg 
Views:	12 
Size:	144.0 KB 
ID:	267024

    Thank you Yeagerb!
    It sucks to get old

//ArrowChat Integreation Code //