News:

Deals Gap 2024: Safety 3rd!


This year:  May 5-12th.  25th year!
(CLICK IMAGE FOR MEET INFO)

Main Menu

Yamaha TZR250 refresh

Started by SoCal250, June 23, 2023, 12:41:15 PM

Previous topic - Next topic

0 Members and 1 Guest are viewing this topic.

m in sc


busa1300

#46
The mikunis on my RGV's have the filters in the carbs where fuel line hooks up (as well as the petcock)...could use those as worst case scenario
I believe they are still available from The Tuning Works in UK... or maybe still from Suzuki... Could also order a RGV petcock while you are at it and be good to go.

https://www.thetuningworks.co.uk/store/product_info.php?products_id=823

https://www.thetuningworks.co.uk/store/product_info.php?products_id=879

RZ350-RZV500R-TZR250RSP 3XV2
RGV250 VJ21 SP/VJ22 SP/VJ23 SP
RS250 for track - KD80 - JR50 for kids
https://youtube.com/@wedgehorsepower9869?feature=shared

SoCal250

#47
I have the OEM filters that fit into the Mikuni TM28s but decided to omit them because they would get stuck inside the fuel line when it was removed each time, resulting in sacrificing the hose to get them out.

What type of fuel hose do you use on yours? I believe the OEM hose is 10mm to the factory T-fitting and then 8mm.  I couldn't find the OEM hose anywhere so I'm currently using standard black 3/8" to the T and then 5/16" to the carbs.
I'm thinking of ordering some Tygon to replace it and see if that works any better.
Most aftermarket hose in those sizes causes issues because of bigger wall thickness than the OEM style.
75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

m in sc

#48
im running some 3/8 i ordered from mcmaster carr, and its thin walled.

https://www.mcmaster.com/catalog/129/163/5235K52

and these from the fitting of the tank to right before the petock. at least on the reserve line. 

https://www.ebay.com/itm/263047897604?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=uxGRsaqrR2S&sssrc=2047675&ssuid=9DXeqLNdSLW&widget_ver=artemis&media=COPY

from the petock im running regular old rubber fuel line (automotive) to the tee, then parts unlimited blue urethane from the t to the carbs.


SoCal250

#49
The TZR project is in a brief pause currently. Took a short vacation and now awaiting parts again.

I've decided to re-engineer the entire fuel delivery system since that's the source of the last issue I was facing. And I didn't want to have to go through it twice when I finally got around to upgrading to the RGV petcock that Max and Randy suggested earlier. By replacing the petcock with the Suzuki unit I can eliminate the need for the inline filter and shut-off valve, which will make the hose plumbing much more simple and easier to route.

So...I've ordered an RGV250 petcock and T-fitting. Once that's here I'll take measurements and order new hose from McMaster, similar to what Mark suggested above. The outlet on the RGV petcock is slightly smaller OD than the TZR OEM unit. Thinking I should be able to use 5/16" hose for the entire system, but need to confirm once I have all the bits in hand.
A replacement fuel tank cap is also on the way. Should be here by Monday.

And in the meantime, I was able to get my solo seat cover 'upgraded' with 10 World Championships! :metal: Thanks to Eddie, Kenny, and Wayne! :patriot: Now I need to find a local paint shop to clear it for me before I reinstall it.

20230718_093101_TZR_autographs.jpg
75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

m in sc

thats sweet!

yeah the fuel delivery system is def something to be desired. I absolutely hate it on the 1kt. I cant imagine on yours but im pretty sure its similar. you have the petcock on the actual tank though, right? (not remote)

SoCal250

Quote from: m in sc on July 18, 2023, 01:34:56 PMyeah the fuel delivery system is def something to be desired. I absolutely hate it on the 1kt. I cant imagine on yours but im pretty sure its similar. you have the petcock on the actual tank though, right? (not remote)

Yes, the petcock is a single assembly attached to the the bottom of the tank, and vacuum-operated (ON-RES-PRI). It has a large single outlet (about 10mm OD if I remember correctly).

20230701_155654_resized.jpg
75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

m in sc

at least you don't have to drain the fucking tank everytime you remove it. like i do.  :bang:  :gentleman:

busa1300

Quote from: m in sc on July 18, 2023, 02:07:45 PMat least you don't have to drain the fucking tank everytime you remove it. like i do.  :bang:  :gentleman:
Will a petcock from a 1990 3MA fit under your tank? That is what I am using on my RZV500R, which has a remote on/off/prime off to the left side.
RZ350-RZV500R-TZR250RSP 3XV2
RGV250 VJ21 SP/VJ22 SP/VJ23 SP
RS250 for track - KD80 - JR50 for kids
https://youtube.com/@wedgehorsepower9869?feature=shared

busa1300

Quote from: SoCal250 on July 18, 2023, 12:57:14 PMAnd in the meantime, I was able to get my solo seat cover 'upgraded' with 10 World Championships! :metal: Thanks to Eddie, Kenny, and Wayne! :patriot: Now I need to find a local paint shop to clear it for me before I reinstall it.

20230718_093101_TZR_autographs.jpg

Cool seat cover  :thumbs:
How did you manage that?
That would really look good on my 3XV2  :whistle:
RZ350-RZV500R-TZR250RSP 3XV2
RGV250 VJ21 SP/VJ22 SP/VJ23 SP
RS250 for track - KD80 - JR50 for kids
https://youtube.com/@wedgehorsepower9869?feature=shared

SoCal250

Quote from: busa1300 on July 18, 2023, 07:19:44 PM
Quote from: SoCal250 on July 18, 2023, 12:57:14 PMAnd in the meantime, I was able to get my solo seat cover 'upgraded' with 10 World Championships! :metal: Thanks to Eddie, Kenny, and Wayne! :patriot: Now I need to find a local paint shop to clear it for me before I reinstall it.
Cool seat cover  :thumbs:
How did you manage that?
That would really look good on my 3XV2  :whistle:
Went on a charity ride that Wayne hosted. Even though the TZR wasn't ready to ride I brought the tail cover in my backpack with a Sharpie.
Got to ride with Kenny, Eddie, Schwantz, Shobert, Chandler, Ricky Johnson, and Checa. It was epic! :righteous:
75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

pdxjim

Quote from: m in sc on July 18, 2023, 02:07:45 PMat least you don't have to drain the fucking tank everytime you remove it. like i do.  :bang:  :gentleman:

I don't have this on my TDR. Why you need to drain the tank to remove it?
Wasting time on 2T forums since the dawn of the internet. '89 TDR250, '13 300xcw, '19 690smcr, '56 Porsche 356A

m in sc

because theres 2 10mm fuel lines coming straight out of the tank that loop around the frame to the remote petcock on the rh side of the frame, wedged in between the frame rail and the fairing. 

kpke

Quote from: m in sc on July 19, 2023, 06:57:24 AMbecause theres 2 10mm fuel lines coming straight out of the tank that loop around the frame to the remote petcock on the rh side of the frame, wedged in between the frame rail and the fairing. 

Great job SoCal. If that ride comes up again in the future please post up here or send me a PM please.

Mark, I'm sure you saw this in another post. These shut off the fuel when disconnected. They are 3/8" very equivalent to 10mm. Available in straight also.

https://www.youtube.com/c/KensGarage1
Hord of RZ350's
RZV500 R6 Suspension and Bodywork
R1 LE #158

m in sc

i bought one, doesn't flow enough. I did a pressure drop/flow test on it, flowed less than a 6mm id hose, which is what feeds the fuel t. I have a few ideas what im going to do, but i do appreciate it.  :gentleman: