XJ Identity problem.

Can anyone help?.
Ive got what I thought was a XJ900F. The Frame No 31A confirms this is a 1983 XJ900F. But The engine No is 29R Thats all that is marked n the block. I cannot find this number anywhere. The bloke I got it off said that the engine was changed. I do have the original engine but that has 29R on it as well. I have bought an Haynes manual that only covers the XJ900F (31A) I need to know what this engine is. Any Suggestions?

 

I know that on the side of the engine, somewhere near the brake pedal mine has the cubic centimeters stamped on it.

mikeg

 

From our friend Chacal - (see supporting vendor)

COUNTRY: JAPAN

MODEL NAME: XJ750E-II
STREET NAME: 1983 XJ750
MODEL ID CODE: 29R
FRAME ID: 29R
SERIAL NUMBER STARTS AT: 000101
NOTE: this model had a 750 engine in the XJ900 frame.


Maybe the engine was swapped with a 750?

 

This is probably what has happened. So the haynes book I bought will only apply to the frame and I will have to get a XJ750 book for the engine. that sucks. But such is life
Thanks for your info

 

Both my engines have 2500cm3 on them but god knows what that means

 

2500cm3 is the oil capacity

 

"god" knows it means 2.5 liters, or the oil capacity of the engine. 2.8 if you're replacing the filter.

 

Check for a displacement stamp between the 2 and 3 exhaust ports.

 

If it really was a 750 E-II, that's a pretty darned rare bike........but it's not. If the frame tube is stamped with a 31A, then it's some type of 900 model, but there were quite a few different versions of the 31A model used over a variety of years.

The full serial number would be helpful in further identifying which particular flavour this bike is.

The 2500cm3 cast into the clutch cover, by the oil filler hole, is the oil capacity of the engine......2500 cubic centimeters.

The engine displacement ("size") is cast into the front, central, upper section of the cylinder JUGS, directly below the where the jugs mate to the bottom of the cylinder head.

29R would indicate a 750 engine, but the 750E-II bikes are so uncommon, it's hard to imagine that somehow, someone ended up with 2 of those engines in that bike..........and if true, I would save those 29R engines and put them aside, as someday, somewhere, someone will have a 29R frame that they'll want to restore, and then you'll have the original engine for that frame, and that, my friend, would be worth a pretty, pretty penny.......

 

Were on the bike can I find this info?

 

Stamped into the steering head pipe (where the steering bearings live) should be the VIN of the bike.

 

Len my thought was someone stuck a 750 engine in the 900 frame. I got excited too until I reread the 31A frame stamp. Odd there are 2 engines but after all these years who knows what happened.

 

Ya hooo...... I'm rich, now all I got to do is turn it into cash. I'm thinking an island in the Caribbean to start with......

The 29R 750cc engine slots straight into the 900 frame, I have purchased an XJ750E-II Parts Catalogue and from a quick comparison of random engine and frame pages the frame is definitely XJ900 and the motor is 749cc (65.0mm x 56.5mm), with most of the common parts (gaskets etc) the same. This appears to be the same motor as the 750RL.

I use the XJ900 service manual for the frame and the XJ750 service manual for the engine and thus far all has worked out OK.

 

I believe Cuba is going to be up for plunder, I mean sale!, soon......

 

29R would indicate a 750 engine, but the 750E-II bikes are so uncommon, it's hard to imagine that somehow, someone ended up with 2 of those engines in that bike..........and if true, I would save those 29R engines and put them aside, as someday, somewhere, someone will have a 29R frame that they'll want to restore, and then you'll have the original engine for that frame, and that, my friend, would be worth a pretty, pretty penny.......[/quote]

I am not that lucky. If it wasn't for bad luck I wouldn't have any.

Thanks for all your info unfortunately with me thinking I had a XJ900F I went out and bought a set of carbs off E Bay (£40 I think that is about $55) that are no use to me because they do not fit.
The history of the bike as far as I know is the spare engine was smoking so it was changed with the one that is currently in. This backfired one day and wouldn't start again then, it was shoved in a backyard for two years. I rescued it from the scrap man(first mistake), Fitted a new loom and electricals. still nothing removed the carbs and found the needle jets were jammed in when the piston was pushed up. Currently in the process of cleaning them will keep you posted on the progress.
Does any one know how to add photo's so everyone can see what I am up against

 

No way, how did I miss this post?

I've got a genuine 29R 750E-II, and would you believe I'm in the northwest too (Crewe). In fact if I didn't know better I'd have sworn this was your old bike since we seem to have similar issues, however I have a genuine E-II frame with 29R stamp...

Bet you're not around much now looking at the date of the post, but if by chance you are, did the spare motor come with carbs? I've got 2 sets of incorrect carbs here and would be interested in any 29R parts you want to sell.

Cheers, Dan.

 

Awww PLEASE still be around wolfie, your luck may change! 8)

 

Looks like you need to lurk around Warrington

http://xjbikes.com/Forums/viewtopic/t=8 ... vious.html

 

Nice spot Adrian thanks

That's only 20/25 miles away!!!

 

Well seems he was long gone by the time I arrived here

Ahh well, such is life :roll: Just got to keep my eyes open for a virago or maggot round warrington now (and not get a slap from random XV/CX people when I follow them home & go "Hi are you wolfie?" haha)

 

Ya hooo...... I'm rich, now all I got to do is turn it into cash. I'm thinking an island in the Caribbean to start with......

The 29R 750cc engine slots straight into the 900 frame, I have purchased an XJ750E-II Parts Catalogue and from a quick comparison of random engine and frame pages the frame is definitely XJ900 and the motor is 749cc (65.0mm x 56.5mm), with most of the common parts (gaskets etc) the same. This appears to be the same motor as the 750RL.

I use the XJ900 service manual for the frame and the XJ750 service manual for the engine and thus far all has worked out OK.[/quote

where did you get an xj750E-II parts list. been going crazy trying to get info for mine..

 

Ya hooo...... I'm rich, now all I got to do is turn it into cash. I'm thinking an island in the Caribbean to start with......

The 29R 750cc engine slots straight into the 900 frame, I have purchased an XJ750E-II Parts Catalogue and from a quick comparison of random engine and frame pages the frame is definitely XJ900 and the motor is 749cc (65.0mm x 56.5mm), with most of the common parts (gaskets etc) the same. This appears to be the same motor as the 750RL.

I use the XJ900 service manual for the frame and the XJ750 service manual for the engine and thus far all has worked out OK.[/quote

where did you get an xj750E-II parts list. been going crazy trying to get info for mine..

 

my 29R XJ750E-II is 1005 off the line imported in 1983. thought from america. now know it was straight from japan.
runs sweet. all original apart from paint

 

http://www.bikechatforums.com/download.php?id=90374

 

http://www.bikechatforums.com/download.php?id=90374