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TOPIC: INTRODUCING BONNIE BELL YAMAHA DT 400

INTRODUCING BONNIE BELL YAMAHA DT 400 04 Mar 2019 20:05 #21

  • YellowAT1B
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NEW PROJECT FOR YAMA-LAND RESTORATIONS!
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INTRODUCING BONNIE BELL YAMAHA DT 400 05 Mar 2019 16:05 #22

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On this bike is the throttle cable supposed to go under the fuel tank and drop down? If so on what side?

Now, it runs through the loop on the headset and runs along side the exhaust pipe with the spring covering the cable.

Thank you...

asco

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YAMA-LAND
818-521-2109
MINIBIKESERVICE@AOL.COM 1971 125cc AT1-C (DOROTHEA) 1971 175cc CT1-C (BRANDY) 1970 250cc DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1975 DT400 (BONNIE BELL)

INTRODUCING BONNIE BELL YAMAHA DT 400 05 Mar 2019 16:18 #23

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YellowAT1B wrote: NEW PROJECT FOR YAMA-LAND RESTORATIONS!

This bike was an unexpected dropped in my hands about 10 days ago.

It’s not a restoration, it’s a make run and sell, so the money goes back into the bike fund.

Incidentally, I wanted to give a comparison between the 75’ DT400 and the 74’ DT360 at least my opinion. The 74’ stayed outside ( more rust ) - it had a pink slip. The 75’ stayed inside the garage near a vent and did not have a pink slip. The 74’ was completely stock but a lot of parts removed for dirt riding. The 75’ had the whole front end changed over - it has a DID 21” front wheel - wierd looking brake backing plate and unknown 34 mm forks. The 75’ has approximately 20 hp. The 74’ had approximately 30 hp. Which means we were going into the smog years. Honestly, if I had to choose. I would say Crosseyed Mary was a better bike simply because it had 33% more horsepower. If I were to do it again - that’s the way I would go. Motorcycles that do not have pink slips are much harder to sell and do not sell for the same money. I got lucky with the AT1M with only a VIN Verification. The 74’ DT 360 has more power then the 75’ DT 400 at least in the Specifications ...

asco

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YAMA-LAND
818-521-2109
MINIBIKESERVICE@AOL.COM 1971 125cc AT1-C (DOROTHEA) 1971 175cc CT1-C (BRANDY) 1970 250cc DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1975 DT400 (BONNIE BELL)
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INTRODUCING BONNIE BELL YAMAHA DT 400 09 Mar 2019 13:11 #24

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Suffice to say the bike must be severely loaded up. New spark plug and starting fluid today. Popped yesterday. Yes, the pilot jet was clogged and cleared today. I have 10 hours in the bike. No more, for me, it goes to the first reasonable offer and gets out of the shop and out of my way.

Somebody else can remove the pipe looking for injection oil / or pull the jug.

a

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YAMA-LAND
818-521-2109
MINIBIKESERVICE@AOL.COM 1971 125cc AT1-C (DOROTHEA) 1971 175cc CT1-C (BRANDY) 1970 250cc DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1975 DT400 (BONNIE BELL)

INTRODUCING BONNIE BELL YAMAHA DT 400 10 Mar 2019 16:33 #25

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When you skip steps you MUST pay.

Remove exhaust ( look for a mouse nest ) kick over the bike several times without the exhaust ( see if the bottom end is full of oil ) ? The exhaust is off, wire wheel / grind it and paint it.

Remove head ( de-carbon piston top ) .

Swap to better carburetor.

Go buy fresh gasoline. Not from August.

Remove Flywheel nut and washers. Inspect key a 2nd. time.

Double your fun ...

There are no short-cuts in Vintage Bikes..

Thanks - MarkT..

a
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YAMA-LAND
818-521-2109
MINIBIKESERVICE@AOL.COM 1971 125cc AT1-C (DOROTHEA) 1971 175cc CT1-C (BRANDY) 1970 250cc DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1975 DT400 (BONNIE BELL)

INTRODUCING BONNIE BELL YAMAHA DT 400 10 Mar 2019 18:44 #26

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My mx400B fired first kick, put 60 dollars into it. Sold it for 1250.00
Capt Dave
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INTRODUCING BONNIE BELL YAMAHA DT 400 10 Mar 2019 19:30 #27

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Capt.Dave wrote: My mx400B fired first kick, put 60 dollars into it. Sold it for 1250.00
Capt Dave


This bike has not been very cooperative. The Nozzle was damaged going back in, ( very tight fit ) from that moment on it has been tough. If you have any suggestions, I am ( all ears). Congrats on the recent success, sometimes I’m a Windshield - Sometimes I’m a Bug.

It will pass go, I will lose. $200.00.

a

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YAMA-LAND
818-521-2109
MINIBIKESERVICE@AOL.COM 1971 125cc AT1-C (DOROTHEA) 1971 175cc CT1-C (BRANDY) 1970 250cc DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1975 DT400 (BONNIE BELL)

INTRODUCING BONNIE BELL YAMAHA DT 400 11 Mar 2019 14:46 #28

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Found oil in the exhaust. No pipe painting. Carburetor will be the last item to deal with. Couldn’t re-check for spark today, to dangerous without the fuel line connected to the carburetor.
Just another maybe it will start? If there is more oil in the bottom end it did not blow out the removed exhaust pipe kicking the bike by hand on the hoist.

EDIT: Tomorrow, I will bring the 2nd. carburetor with me to Van Nuys Suzuki and try to get a float chamber gasket ( TS 400 ) from Michael Candreia ( Mr. Suzuki ) and pick up some fresh fuel ..

By next Monday we might see 70 degrees here, that would be a welcomed change.

Removed the flywheel — again / no issues there. Looks like the piston is original bore, no problems of scoring on the cylinder walls and no piston slap as far as I can tell. It may be low miles bike. No visible cross hatch hone marks.

The shop is a mess, tools scattered everywhere.

a
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YAMA-LAND
818-521-2109
MINIBIKESERVICE@AOL.COM 1971 125cc AT1-C (DOROTHEA) 1971 175cc CT1-C (BRANDY) 1970 250cc DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1975 DT400 (BONNIE BELL)
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INTRODUCING BONNIE BELL YAMAHA DT 400 14 Mar 2019 15:09 #29

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Parts will be in the mail tomorrow. Should find out if the bike will fire soon after that.

a

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YAMA-LAND
818-521-2109
MINIBIKESERVICE@AOL.COM 1971 125cc AT1-C (DOROTHEA) 1971 175cc CT1-C (BRANDY) 1970 250cc DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1975 DT400 (BONNIE BELL)

INTRODUCING BONNIE BELL YAMAHA DT 400 14 Mar 2019 18:33 #30

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Say hi to Mike for me, he raced my 125 for an article in Motorcyclest.

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