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03-02-2012, 06:47 PM
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#31 |
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n00b
Joined: Mar 2012
Location: West Tennessee
Oddometer: 4
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Bought this one off a friend for $200,rolled it off the trailer,dumped some premix in the tank and away I went!
Old bike would make your hair bleed. Good luck with yours, It'll be awesome when you finish.  My 15 year old rode it everyday for a month till it roasted a piston skirt and I traded it.Had the stock piston from 74 best that I can tell. 
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03-04-2012, 04:23 AM
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#32 |
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Cob Artist
Joined: Mar 2008
Location: Working in my shop in Springtown Texas
Oddometer: 783
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Fork seals for your bike are Yamaha number 278-23145-51-00 and still quite available. Powersports Plus has them.
http://www.powersportsplus.com/parts...145-51-00.html That same seal fits the following bikes... 1967 YR1 FRONT FORK 1968 DT1 FRONT FORK 1968 YR2 FRONT FORK 1968 YR2C FRONT FORK 1969 DT1B FRONT FORK 1969 DT1S FRONT FORK 1969 R3 FRONT FORK AND FRONT FENDER 1970 DT1C FRONT FORK 1970 DT1CMX FRONT FORK 1970 R5 FRONT FORK 1970 RT1 FRONT FORK (RT1, RT1M) 1970 RT1 FRONT FORK (RT1B,RT1MX) 1970 RT1M FRONT FORK (RT1, RT1M) 1970 RT1M FRONT FORK (RT1B,RT1MX) 1970 XS1 FRONT FORK (XS1) 1970 XS1 FRONT FORK (XS1B) 1971 DT1E FRONT FORK 1971 DT1MX FRONT FORK 1971 R5B FRONT FORK 1971 RT1B FRONT FORK (RT1B,RT1MX) 1971 RT1MX FRONT FORK (RT1B,RT1MX) 1971 XS1B FRONT FORK (XS1B) 1972 DS7 FRONT FORK 1972 DT2 FRONT FORK 1972 DT2MX FRONT FORK 1972 R5C FRONT FORK 1972 RT2 FRONT FORK 1972 RT2MX FRONT FORK 1972 TD3 FRONT FORK 1972 TR3 FRONT FORK 1972 XS2 FRONT FORK (XS2) (TX650 - ) 1973 DT3 FRONT FORK 1973 MX250 FRONT FORK 1973 MX250A FRONT FORK 1973 MX360 FRONT FORK 1973 RD250 FRONT FORK 1973 RD250 FRONT FORK RD250B 1973 RD350 FRONT FORK 1973 RT2MX FRONT FORK 1973 RT3 FRONT FORK 1973 SC500 FRONT FORK 1973 TX500 FRONT - FORK 1973 TX650 FRONT FORK (XS2) (TX650 - ) 1973 TZ250 FRONT FORK 1974 MX250A FRONT FORK 1974 MX360 FRONT FORK 1974 MX360A FRONT FORK 1974 RD250A FRONT FORK 1974 RD350A FRONT FORK 1974 SC500A FRONT FORK 1974 TX500A FRONT - FORK 1974 TX650A FRONT FORK TX650A - XS650B 1974 TY250A FRONT FORK 1974 TZ350 FRONT FORK 1974 YZ250A FRONT FORK 1974 YZ360A FRONT FORK 1975 DT250B FRONT FORK 250B - C - 400B - C 1975 DT400B FRONT FORK 250B - C - 400B - C 1975 MX250B FRONT FORK 1975 MX400B FRONT FORK 1975 RD250B FRONT FORK 1975 RD250B FRONT FORK RD250B 1975 RD350B FRONT FORK 1975 XS500B FRONT - FORK 1975 XS650B FRONT FORK TX650A - XS650B 1975 YZ250B FRONT FORK 1975 YZ360B FRONT FORK 1976 DT250C FRONT FORK 250B - C - 400B - C 1976 DT400C FRONT FORK 250B - C - 400B - C 1976 MX125C FRONT FORK 1976 RD400C FRONT FORK 1976 TY250C FRONT FORK 1976 XS650C FRONT FORK XS650C 1976 YZ100C FRONT FORK YZ100C 1976 YZ125C FRONT FORK YZ125C 1977 RD400D FRONT FORK 1977 TY250D FRONT FORK 1977 YZ100D FRONT FORK YZ100D 1978 RD400E FRONT FORK 1990 MOTOCROSS - YZ250A FRONT FORK |
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03-04-2012, 11:09 AM
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#33 | |
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Beastly Adventurer
Joined: Jul 2009
Location: Oregon City Orygun
Oddometer: 8,233
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Quote:
 , till you go to a 79 RD  35mm forks 
__________________
Alexa Drew Nov 9 1995- Oct 28th 2004 Miss you baby  '08 KTM 530 EXC 79 RD 400 Daytona |
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03-04-2012, 11:16 AM
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#34 | |
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Cob Artist
Joined: Mar 2008
Location: Working in my shop in Springtown Texas
Oddometer: 783
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Quote:
1T3-23145-00-00 OIL SEAL http://www.powersportsplus.com/parts...145-00-00.html |
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03-04-2012, 11:38 AM
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#35 | |
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Beastly Adventurer
Joined: Jul 2009
Location: Oregon City Orygun
Oddometer: 8,233
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Quote:
__________________
Alexa Drew Nov 9 1995- Oct 28th 2004 Miss you baby '08 KTM 530 EXC 79 RD 400 Daytona |
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03-04-2012, 06:35 PM
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#36 |
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Beastly Adventurer
Joined: May 2008
Location: Hilo, Hawaii
Oddometer: 1,302
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Fork seals
A quick search turned these up:
http://www.amazon.com/1968-1973-Yama.../dp/B006923CVC and these OEM ones: http://www.mrcycles.com/fiche_sectio...973&fveh=51610 I think all of the DT yamahas used the same seals.
__________________
"The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."J. Cooper |
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03-04-2012, 07:27 PM
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#37 |
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Have guns will hunt
Joined: Jan 2006
Location: Gympie Queensland Australia
Oddometer: 5,404
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These come up for the RT1
http://stores.ebay.com.au/Motorcycle...&_sid=47423278
__________________
I REALLY AM A NICE GUY. JUST ASK ANYONE WHO HASN`T MET ME.  
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03-06-2012, 07:15 AM
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#38 |
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koolaidless
Joined: Oct 2005
Location: the dry side of Oregon
Oddometer: 1,903
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 so............must have been riding on Sunday............sure nice weather for it 
__________________
Been there, broke that   SFS |
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03-09-2012, 07:46 AM
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#39 |
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backtrackvideo.com
Joined: Jun 2006
Oddometer: 829
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Love it...don't quit!
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03-09-2012, 08:38 AM
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#40 | |
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Adventurer
Joined: Feb 2012
Location: Madras, Or
Oddometer: 19
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Quote:
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03-14-2012, 12:10 PM
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#41 |
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Studly Adventurer
Joined: May 2009
Location: Westminster CO
Oddometer: 799
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Great thread, keep it coming. I did a quick resto/shoepolish on a 76 DT125, they sure are fun and pretty bulletproof.
__________________
Project Labor of Love: 1972 CT90 Rebuild Current Stable: DRZ400 | VFR800 | DRZ250 | CT90 | CB125 Need an airfilter for your DRZ250!? I have too many, PM ME 
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03-16-2012, 10:00 AM
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#42 |
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Adventurer
Joined: Feb 2012
Location: Madras, Or
Oddometer: 19
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Opps......
Great information my fellow adv riders have provided me! So I have no clue what I initially was looking at when I couldn't find OEM seals. Sure enough, I went back and the seals were available. I slapped my forehead
 ....thinking how could I have been so blind and then blubber to the internet world about not being able to find seals. Well.... needless to say, I ordered up a set of seals.My husband finally got a chance to work on porting the piston. He took the new piston and was comparing it to the old one that I had and he thought they looked very similar in size. He managed to hunt out where I had left the cylinder head and tested how it fit and it fell right through. When I finally returned from work, my husband showed me that the piston I ordered was too small  . It was .012mm bigger than the previous piston. When looking at the old piston, it was stamped .25 (so I assumed... lesson learned). I thought I was starting with .25 over, so ordering a .75 over was going to be plenty.... or so I thought. I choose to change course from the reeds/porting cylinder. I took the other cylinder head and checked to see if the any of the pistons we had would work. The piston that I had in the miscellaneous box of parts would work. I began prepping the new cylinder head, so I could take it to the machinist.  I had to remove the decompression valve.  And remove studs that were in place.  I also had to clean/scrape stuck on gasket and heavy grime.  I boxed the cylinder head and piston up and dropped it off at our local machinist to do his magic, aka bore and hone the cylinder to match piston. Now I wasn't kidding when I first introduced my intentions for this rebuild that there were going to be trials and tribulations. Go ahead, laugh, I know you want to..... it's okay I already have  . I've learned a lot during my project so far and I'm sure there will be many more learning experiences. I'm not going to give up on the reed/ported cylinder, but I want to get the bike going, so I choose the alternative to get the bike going the soonest . Keep providing the excellent feedback, since all of you are helpful in providing information for me. Thanks for the help everyone and stay tuned!!!! |
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03-19-2012, 08:49 PM
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#43 |
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Adventurer
Joined: Sep 2011
Location: Acapulco. Mexico.
Oddometer: 57
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Suscribed... !
__________________
2005 YAMAHA XT660X "My mouth was drier than an Egyptian’s sandal and my palms sweatier than a fat girl’s bra". Jamie Robinson. |
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03-21-2012, 01:38 PM
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#44 |
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On Any Sunday
Joined: Mar 2011
Location: Columbia County
Oddometer: 582
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You are doing great!
__________________
"Nothing can stop us but fear and common sense” |
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04-05-2012, 04:38 AM
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#45 |
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Adventurer
Joined: Feb 2012
Location: Madras, Or
Oddometer: 19
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A step closer
Oh my.... where does the time go. I've squeezed in a few hours here and a few hours there working on the bike, but I haven't had a chance to post until now. Sorry to all those waiting for the next step!
The local machinist was very quick in getting the top end back to me. I think it was two days and it was delivered to the shop. I was surpirsed to hear from my husband that it was there and awaiting my return. When I finally got a break from my job, I headed in to the shop to apply a few hours of work to the bike. I attempted to put the bike up on a bucket, so I can work on the bike with it in an upright position. Even though I put all my strength into it, there was no way I was going to get that bike high enough to place it on the bucket. I was caught off guard, because I've hefted my crf230 onto a bucket many times and didn't have a problem like this. It's surprising at how the weight distribution on bikes has changed so much over the years, as well as the advancement of the types of metal used within the bikes. So I gave in and asked Mr Forrest_fire1 to provide the brute strength that I lacked to place the bike on a bucket.  TA-DA! Such a keep and simple bike stand, that works so well. I began with applying the new rings on the piston. Of course before I started I said a small prayer, in hopes that I wouldn't break the piston rings. Mr Forrest_fire1 has told me many stories of his past rebuild experiences and breaking many piston rings. It took me alittle bit, but I manged to apply both rings without breaking them! Next step, I placed a clean rag over the open crank case, because I'm know to have butterfingers and drop all sorts of stuff and I would rather not have to fish out any parts. Knowing my luck if I were to drop something in the crankcase, it would be a teny tiny pin/clip.... Anyways. I fitted the bearing on the piston rod.  Then added on my new piston. The pin was a nice tight fit and eventually I manged to get the pin clips in place. I'm almost positive there is an easier way to place them, but I managed. Waa-laa. New piston and rings applied.  This is where I stop on finishing the top end. I feel it will be easiest to have an extra set of hands when trying to install the cylinder head. Unfortunately the shop was very busy that day and Mr Forrest_fire1 was unavailable to assist. My next project choice was to break into the carburetor. Which is easier said than done.   These are a few before photos, partly so I can remember what it's supose to look like when I attempt to reassemble the carburetor. One experience that I got to enjoy all to myself, that I want to extend to the ADVrider community was the pungent, terrible smell of bad gas and oil that came from the carburetor.  I began disassembling the carburetor and keeping track of all the tiny parts I was removing. I then attempted to remove the float bowl and it wouldn't budge. I thought it was something I missed, so I rechecked to make sure I got all the screws out and double checked the repair manual. I didn't miss any screws, but the carburetor wasn't going to come apart. I went to seek out some advice on what to do next. Mr Forrest_fire1 dad showed me a trick for gentle leverage, that allowed us a big enough gap to apply some distilled alchol to clear away some of the grime. After multiple coats and some manipulation. We got the carburetor apart.   Well..... I think the picuture explains a lot. I'm unsure of how long that few has been in that carburetor. We decided the carburetor needed a good soak down. We removed all parts that could be damaged during the soak and set them aside. I of course took a picture to keep track of them (so i would know if something came up missing later). Smart thinking, right?  Then I put the carburetor in it's bath of distilled alcohol to let it soak away the goo, grime, oil, and gas.  This would be the spot that I had to stop at for the day. I learned so much about carburetors, because my father-in-law is very knowledgeable with small engines. He provided a few helpful hints in continueing my rebuild and some info that will help with future adjustments on the carburetor. More to come, but unfortunatetly the time constraint has hit me again. Hopefully I will find some time very soon to add on to the saga. |
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