Topics

1

Yamaha / 3R3-15618-01 Kickstart Lever Boot - Yamaha IT175, IT200, YZ100 & YZ125

« on: June 01, 2022, 07:38:48 am »

Hey guys,

I have been in collaboration with Sumo Rubber in the UK to make new kickstart boots for the 3R3-15618-01 Yamaha IT175, IT200, YZ100 & YZ125.  They fit a lot of the steel kickstarts on a lot of these models.  Took a few years, but they are finally for sale. They used one of my boots to make the replacement. Next up is the alloy kickstarts for some of the models.

https://sumorubber.com/3r3-15618-01-kickstart-lever-boot?fbclid=IwAR2Lz5nVeCJij1cC7-aHuMlU0je3rlTK9dr0SHcEX6g4PEvxY3pUu5EfAQU

Cheers,

2

Yamaha / Kick start boots

« on: February 25, 2022, 09:55:41 pm »

Hey guys,

Just got news that the kick start rubbers boots for most of the 80’s IT and YZ bikes are in pre production.
Sumo rubber sent me some pics and they look good.
I gave them samples almost two years ago, and they have just come through with the goods.

Keep an eye on the Sumo Rubber website for details. Should be in full production soon.

Cheers..

https://1drv.ms/f/s!AvgraWJNxK2SmXTyMM922spgTDnB

3

For Sale / IT175 G/H 3R6 Chain Guard and Inner Mud Guard

« on: July 01, 2020, 01:52:21 pm »

Hi,

Up for sale are some great condition plastics for the IT175 G/H.
Both parts are in great condition with no cracks, tears, rips, splits or missing parts.
Quite rare chain has no chain rash or wear/splits. Will suit restored bike.
Inner mudguard still has intact rubber flap all in good condition.

Both parts for AUD $80 plus delivery.
Cheers,

4

Tech Talk / YZ/IT Handlebar holder dot

« on: May 23, 2020, 03:13:02 pm »

Hi guys, im having a brain fart moment.

I removed the bars from all my old bikes.
Now i am struggling to remember which way all the old bar clamps go back on, and the tightening sequence.
They have the dot on top on one end.
Ive looked through all my manuals, and can't find any info on it.

They seem to fit either way, but i know their is a specific orientation and tightening sequence.
Any help for an old fart appreciated.

Cheers,
Alex

5

Tech Talk / Pivot Pegz

« on: December 09, 2019, 01:17:49 pm »

So i have been talking about footpeg options for the 1980 YZ125G with forum members.  These older style 8mm pin pegs fit a variety of the early model YZ's and IT's.  A lot of folk upgrade to the aftermarket PW50 wide footpegs (usually Chinese).
I emailed Pivot Pegz and they have a custom section.  They said they have the template for these models and can custom build a set. No extra cost.  Free post in Australia and a free rebuild kit.

These pegs are not for everyone, but if you talk to folk that have used them, some rave about how good they are. Easier to shift gears, more foot platform when leaning back etc..

Not real cheap, but super Australian made quality.  Ordered some this morning and look forward to fitting them up.

https://pivotpegz.com.au/spares/custom-set-of-pivot-pegz-part-pp-00mk3



Cheers,

6

Wanted / YZ125 Parts wanted

« on: October 04, 2019, 06:18:37 pm »

Hi guys,

Chasing parts for the 1980/81 YZ125 G/H

Looking for a seat for the G/H
Looking for an airbox lid for the G/H.  Also IT175 1980/81 fits.
Looking for an engine and frame

I am in Perth.  Any parts above appreciated.

Cheers, Alex

7

Bike Transport / Anyone help with a pallet of bike bits from Gosford area to Perth

« on: August 21, 2019, 01:22:52 am »

Hi gang,

Looking at getting a pallet of YZ80E bits from Gosford to Perth. Its a pallet full of bits.. wheels, frame, donk etc..
Any help appreciated, re advice on transport companies.. storing a pallet at your place.. etc..

Cheers,
Alex

8

Tech Talk / Not even a Fart

« on: May 12, 2019, 10:31:22 pm »

Hi guys,

Finally got my little 1979 YZ80F back together.  New piston and rings. Good compression. Big fat blue spark when kicking over. I am using the carb and reed block from my 1978 YZ80.  This carb and reed block starts the 78 right up. I have lots of fuel and am using a new petcock.  Plenty of fuel running into carb.  So i have fuel, air and fat spark.  But i kick and kick and don't even get a Fart. Dead as a door nail, not a puff of smoke, not a hint of ignition. 

Now i know i could have a leaking seal, timing slightly out etc.. but generally you get a whiff of a fart, smoke, life etc..

Ive pulled the plug a few times and still a nice fat blue spark. I have new head and base gaskets and everything is new and tight.  Bike has never run since i have had it.  Previous owner reckons it ran, but the old girl is a piece of shit and i doubt it ran in years.

I want to get her running to check gears, clutch etc.. before i tear her down for a complete rebuild.

I have used start ya bastard and she is still as dead as a dodo.  Any ideas on why there is no life what so ever?
Remember, she has compression, fat spark, fuel and air...

Cheers,

9

General Discussion / The Shit They Sell on Ebay

« on: January 07, 2019, 11:31:06 pm »

This lever is for sale for $16 USD + post through a bike parts shop on Ebay.  Not sure what the tape measure is for, perhaps to check how much shorter the lever is once it was curled over like an elfs shoe. I'm not even sure how you could bend one around that much without snapping it. 

10

Honda / Honda QA50 Beast

« on: July 22, 2018, 05:33:02 pm »

The K0 Honda QA50 came out about circa 1970.  Two speed fun bike that was bullet proof.
Nearly 50 years on and they are quite rare and expensive.

This one popped up on Gumtree and was screaming for me to take it home.  Its hammered, but runs OK, and its for the daughter to put around on, while the boy zooms around on his bikes..

I do already have a nice restored sprout green QA in the mancave, but its too good and rare to ride.  This one is going to be perfect for a bush basher.



A lot of guys on here would of cut their teeth on one of these back in the day.  Me and my brother did.  Dad got two for $400 and we spent all summer bashing around on these.  We even raced them at the local club against a couple of other bad dudes on QA's...

Those were the days.... I had ski goggles, and my brother had to wear a beanie under his helmet because it was too big.  But we were kings of the bush....



I remember dad taking this pic of me when i was 12....



Eventually both QA's died and wouldnt run.  Dad took them to the shop to get fixed.  When we picked them up, the service guy said "do you guys know about cleaning air filters??"  We all nodded no..... Bikes ran great again once they could breath..

Now, years later, this one is for the daughter to enjoy.  She used to ride the other one a few years back and really enjoyed it.. this is her enjoying a ride on the bike before i did the rebuild and changed the colour from gypsy yellow to sprout green...



A recond one looks great and make a great pit type bike.
The one below is in Sprout Green and has been lovingly restored...



I hope we can have a few fun years out of this old girl..

Cheers,

11

Tech Talk / Coil Ohms Readings

« on: July 19, 2018, 06:31:28 pm »

Well, i have absolutely no spark whatsoever on my little YZ80E.
It has the outer rotor style magneto assembly.
The Yamaha book i have for the year says the  Primary coil should be 1.0 Ohms
The secondary coil should be 5.9K Ohms.  And it doesnt mention a value for the tiny pulser coil.

I have uploaded a pic (below).

The exploded view diagrams online refer to both the larger coils as source coils.
I am getting about 359 Ohms through the brown wire which leads to the biggest coil.
I am getting nothing through the smaller coil which has a red lead. No Ohms and it seems to test as an open circuit.
I am getting about 9.9 Ohms through the pulser coil which is a white lead with an orange stripe.
I have tested the smaller coil lead right back from the plug to the coil, and i get a reading that the cable is OK.

So, my questions to all you guru's is... Which coil is primary and which is secondary?
I could replace the smaller coil with the red wire, but do the other values sound correct?



Cheers,

Alex

12

Yamaha / 1978 YZ80E Rebuild

« on: May 30, 2018, 12:54:47 am »

Well, as usual i have bitten off more than i can chew.
My first real MX bike was the YZ80E.  My eyes nearly bugged out the sockets in 1978 when they arrived in the showroom. Euro white, Monoshock.. what a weapon.  Dad got me one for Christmas and i set about racing it on the sand tracks of WA.  Unfortunately, the E had a great 5 speed engine, but the frame was plagued with problems.  In fact, i broke my knee on it and 40 years later i am still feeling it.
Great looking bike and went like a rocket and lots of memories.  I have a 79 YZ80 coming so i was looking for parts.  An E pops up on Ebay with a bunch of original parts and NOS stuff.  I grab it, and now i have an E and an F coming on the truck to WA.



As this is a VMX forum, i doubt there was a kid around 78 that didnt admire the E.  The 79 F was a far superior bike, but thats another thread.

This is the old girl i have coming over...



And she also comes with these parts and more..





The guy i bought it off is a bike nut too, so we had a good chat. He has 4 YZ125K's!! That beats my two!!

Anyway, i have started to prepare for the arrival and build.  Searching for parts, the E came standard with Takasago rims.  I have found two NOS rims.  Also, i have located a NOS frame gusset kit complete with instructions.  This kit will be tig welded into the frame before blasting, zinc coating and powder coating.

Almost all the plastics are original, but i will have to use a DC front mini bike plate.  The E used the special Yamaha mounting hooks and rubber band. 
Lot of work here, but it will be a labour of love. 
Still got to get cracking on my YZ125G and all my other projects, but this is going to be fun!!

Cheers,

13

Yamaha / 1979 YZ80F

« on: May 18, 2018, 10:23:24 pm »

Hi gang,

I have added a new bike to the stable.  A 1979 YZ80F.  Had one new back in the day. Had a good season on it, as it was a rock solid mini racer.
Anyway, i have started collecting parts and am stuck for a filter cage. I believe the filter cage is the same for the E, F and G. Part number 2J5-14458.  I have searched all my regular hunting grounds and i have hit a dead end.
Anybody have a spare tucked away? Pic below of the cages was grabbed from Facebook...

The idea is to get her ready for the boy to ride (with the XR75) in some VMX meetings just for a bit of fun... then do a full rebuild later on.

Will add progress reports..







If anyone has any other nos parts they want to sell, i would be very interested. Especially plastics..

Cheers,

14

Yamaha / YZ80A $1500

« on: October 15, 2017, 12:08:47 am »

YZ80A on gumtree for $1500.  Dont know much about them but this one looks like it could be a great bike.

https://www.gumtree.com.au/s-ad/kelmscott/motorcycle-scooter-parts/yamaha-yz80-1974/1162582799

Cheers,

15

Tech Talk / White Smoke

« on: August 26, 2017, 01:16:12 am »

Had a great day out at Ducks Nuts Ride Park 2 hours out of Perth. Went with a mate who has a CR500.  I took both my YZ125K's.  Run the yellow one in with its new ProX piston.  However, after about 30-40 minutes on each bike, they both blew white smoke and died. Still kicking over but no life.  I pulled the plugs and both had antifreeze on the plugs.
A couple of things... i used a torque wrench to torque up the yellow bikes head (18ft/pounds 25nm).. but it never felt very tight. The white bike had a lot tighter head nuts using a 12mm spanner "hand tight".. both done in a crisscross pattern.
The white bike had the rad cap swapped out for a 1.6 bar one, as i was loosing fluid through the overflow. 
Both bikes use after market Mitaka head gaskets.

Just wondering if you guys have any idea's on what can cause the problem with both bikes. Does anyone use yamabond either side of the head gasket.. could the head studs be stretching, cap holding too much pressure, bad quality head gaskets, head not tight enough, any other things??

Will order a few OEM head gaskets anyway, but i also have a few more new Mitaka head gaskets.
I haven't pulled the heads off yet, as we only went riding today.. is there anything i should look for?
Did some research tonight and Wiseco do produce a 58mm head gasket.  Have put 3 hours on this top end without a problem, but perhaps with the higher pressure cap, something has let go. Will also order the W4053 gasket kit.

One other thing... the white bike has a 2mm oversize piston. Have been using a stock size head gasket. 

Cheers guys...