1988 rebuild update

oldman

@nottsbiker said in 1988 rebuild update:

Only the ones with the additional intake silencer attachment will be left before long

Which one is that?

Nottsbiker

Like those fitted to late DTR / DT-X etc had a hole for another yeis type bottle to plug in and act I'm guessing as an intake silencer

oldman

@nottsbiker looked on cmsl exploded diagrams, can only see the pattern as mine even for later bikes, same part no? May seal mine with self amalgamating tape while I am waiting, (I get bored easily!)

Nottsbiker

Least it's not downstream of the carb so you won't do as much damage if it's not 100% sealed.

oldman

It is downstream of the carb, air drawn in rather than through carb hence starting difficulties, just as well found now, could have been much worse if I was caning it around, will try and post a pic hortly

oldman

There you go! How did I miss that!

Calum

@nottsbiker It's not a silencer. It's Yamaha Energy Intake System and is used to as a resonance boost bottle.

I've explained it before, but probably poorly. Definitely research it.

Nottsbiker

Jesus! How did your guide dog get that carb in there and miss that massive split

Nottsbiker

@calum said in 1988 rebuild update:

@nottsbiker It's not a silencer. It's Yamaha Energy Intake System and is used to as a resonance boost bottle.

I've explained it before, but probably poorly. Definitely research it.

I know what the YEIS does but I'm unsure if the second 'bottle' is a boost bottle and always assumed it was a modification by Yamaha to the older engine to either quieten it down more or improve emissions.

Calum

@nottsbiker As @AndyYam used to say, the competition WR had those same bottles. They wouldn't restrict a competition bike.

oldman

Split was not there when reassembled, ran fine at the time, been a few weeks since then waiting for wheels to be done, just old rubber I guess, could have gone anytime

Nottsbiker

@calum said in 1988 rebuild update:

@nottsbiker As @AndyYam used to say, the competition WR had those same bottles. They wouldn't restrict a competition bike.

Just had to Google that to check and you are correct

oldman

Had a look for the tdr exploded diagrams on csml, intake looks the same but different part nos, bad news is that one is €65 exc postage

oldman

Still can't see a second bottle though. Only the normal bottle?

Nottsbiker

Yes I thought that might be the case due to having the dellorto rather than the mikuni carb.

If i could find a 200R engine I'd use the associated carb which I reckon is the same 28mm mikuni as the DTR

Darty

@calum Not 100%, Yamaha restriced the intake volume on the WR200 for ridabilty,

It was never intended for competition, it's a trail bike. Hence their effort to smooth out intake pulses at low RPM with YIES.

declan

@oldman I had that exact same split I had to glue mine though

oldman

Ordered the new one but will repair old one when I get it off, what glue did you use and how is it holding up?

Nottsbiker

Mine was smothered in silicone. Doubt you'll get a glue that remains flexible enough, although a contact adhesive like carpet glue might work.

declan

@oldman just used some cheap super glue from the local paper shop its friendly to rubber wood etc and as far as I know it worked a treat

DT125R FORUM

1988 rebuild update