1978 vs 1979 yz 100

johhnycellar
Edited Date/Time 5/5/2021 4:06am
Is there any difference between the 1978 yz100E and the 1979 yz 100f. Bought a 79 new as a kid but it is long gone. Was looking to find a 79 to restore. Found a 78 and the look identical.
|
Shawbridge Husky 1/3/2021 1:22pm
1/3/2021 1:22pm
Looked on Partszilla looks like '78E-'79F same except maybe a few minor parts, 77D is in there as well. Seat of the pants I'd say very close if not same maybe check pipe, jetting etc.
johhnycellar 1/4/2021 4:39pm
1/4/2021 4:39pm
Thanks for the replies.
1
a22
Profile picture for user a22
Posts
873
Joined
7/21/2011
Location
London GB
Fantasy
785th
a22 1/4/2021 6:15pm
1/4/2021 6:15pm
johhnycellar wrote:
Is there any difference between the 1978 yz100E and the 1979 yz 100f. Bought a 79 new as a kid but it is long gone. Was...
Is there any difference between the 1978 yz100E and the 1979 yz 100f. Bought a 79 new as a kid but it is long gone. Was looking to find a 79 to restore. Found a 78 and the look identical.
We also had a new 1979 100F back in the day, was a great bike. We ran it for 2 years then got the YZ100H- 1981. The 1981 H handled better but in someways I liked the 79~F- it was really fast. First few races I won on those bikes- as said think the YZ100E was very similar to the YZ100F. Damn super bikes- the RM's handled slightly better but the YZ's seemed faster - remember hitting bumps and jumps on that thing really hard but was great fun.
1

The Shop

See All »
johhnycellar 1/8/2021 6:27pm
1/8/2021 6:27pm
Yes I remember those days. Even kept up well on track with the rm 125. Guess it was the rider. Lol.
RDnutz
Profile picture for user RDnutz
Posts
553
Joined
2/13/2021
Location
Dolores, CO US
RDnutz 2/13/2021 4:36pm
2/13/2021 4:36pm
78/79- they are basically the same bike. Some changes started in 1980 with FIM side plates and motor tweaks and carried into 1981. Weak points on the 78/79 is the compact chassis confining for many adults, wimpy clutch, skinny flexy forks & clamps, and lame rear shock that can't easily be modified/improved and no direct swaps from other Yamahas of the era or aftermarket options available. The motor however, as others noted is very competitive and reliable. Luckily they are direct bolt in for any 1977-79 YZ125 chassis that solves most the shortcomings of the 100 chassis.
johhnycellar 2/14/2021 1:50pm
2/14/2021 1:50pm
Thanks. Looking for a 79 yz 100. The first new bike I ever bought myself.

1
RDnutz
Profile picture for user RDnutz
Posts
553
Joined
2/13/2021
Location
Dolores, CO US
RDnutz 2/15/2021 7:00am
2/15/2021 7:00am
Apologies for the thread Hijack. Thought you were looking for something to race in VMX 100cc class now. My 1st 100 I bought myself was 1972 Yamaha LT2 when I was 13 y/o. No pictures of that 1, but here's a 78 100E I had about 10 years ago.
johhnycellar 4/23/2021 1:51pm
4/23/2021 1:51pm
That’s. A nice ride.
skypig
Profile picture for user skypig
Posts
895
Joined
8/1/2009
Location
Caloundra AU
skypig 4/23/2021 4:52pm
4/23/2021 4:52pm
100cc were unknown in Australia.
There were a fair few differences between a YZ80E, and the ‘79 YZ80F.
The F was much better. (Frame/Swingarm/“internal rotor” ignition.)
oldmxracer
Profile picture for user oldmxracer
Posts
43
Joined
6/29/2009
Location
Benton, IL US
oldmxracer 4/25/2021 1:16pm
4/25/2021 1:16pm
a22 hit it on the head. 78 YZ was faster, but the RM's lasted longer. Good times!
Richard Tease II 5/5/2021 4:06am
5/5/2021 4:06am
skypig wrote:
100cc were unknown in Australia.
There were a fair few differences between a YZ80E, and the ‘79 YZ80F.
The F was much better. (Frame/Swingarm/“internal rotor” ignition.)
Early 80's (83-86) 100cc was quiet popular in Oz.

Post a reply to: 1978 vs 1979 yz 100