1988 rebuild update

[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

[finnerz89]

I'd try super glue as well