newbie with 3 maxims

Hi all new the the site and to motorcycles. My dad bought 2 maxims an 83 650 and 750 a few months ago for a few hundred each and got them going, and i just bought an 85 700 about a week ago. The first two we got running great but mine we just found out has low compression. We though at first it was just running rich because it wouldnt start while warm or idle but otherwise ran pretty well and didnt burn oil or smoke, but did a compression test yesterday after we couldnt find anything worng with the carbs and sure enough only like 75 pounds... So anyways we tore the engine out today and as soon as I get my hand on a service manual were gonna replace the rings, hopfully that should fix it, what do you guys think? Its a fun bike and in great condition other than the low compression, haha. Cant wait to get it going hopfully i wont run in to any more problems.

 

lm2) Original reprinted FACTORY SERVICE MANUALS are also available. These full-size manuals covers all aspects of diagnosis, repair, and assembly for specific model bikes. These brand new, official Yamaha manuals are one of those "must-have" tools if you're going to be wrenching on your own bike. Plenty of photographs, diagrams, flowcharts, wiring charts (some of them even being correct!), torque values, etc. NOTE: cover design, color, and appearance may differ from originals.

NOTE: originally, Yamaha would not release a new service manual for each year's production, unless there had been significant changes in design, service procedures, features, etc......and even in those cases, even if there HAD been significant changes, they would not release an entirely new service manual, but merely a "supplement" to the past service manual for that model, and that supplement would highlight only the changes to procedures, etc. that would need to be followed.

For example: the 1980 XJ650 Maxim---being the first model in the XJ650 series---was issued a service manual by Yamaha. The 1981 XJ650 model, having no significant differences from the 1980 model, used the same 1980 XJ650 service manual. However, the 1982 XJ650 Maxim models had a number of meaningful difference in service procedures (first and foremost, the introduction of the YICS cylinder head design and system, which required a different synchronization procedure, a variation to the engine teardwon and re-build procedures, etc.).

Rather than publish a brand new service manual for the 1982 XJ650 Maxim models, Yamaha merely published a service manual Supplement and instructed dealers to use the 1980 XJ650 Base Service Manual along with the 1982 XJ650 Supplementary Service Manual to properly service those bikes.....after all, 90% of the procedures in the 1980 XJ650 "base" Service Manual still applied and were valid for the 1982 XJ650 Maxim models, so why publish an entire new manual, when just a "supplement" would work?

This same process applies to many of the original models and their service manuals. The 1982 XJ750 Maxim models, for instance, used that same 1980 XJ650 Maxim Service Manual as the "base manual", and had a 75-page XJ750J Supplementary Service Manual that was to be used in conjunction with the base (1980 XJ650) manual.

That was then.

This is now: all of the Supplementary Service Manuals are rolled into the front of the "base manuals" for the individual manuals listed as reprints below. So for instance, the 1982-3 XJ650 Maxim Service Manual has both the 1980 XJ650 "Base" Service Manual AND the 1982-3 XJ650 Supplementary Service Manual bound together into one book.....no need to acquire two different books to have all of the correct prodcedures for working on your 1983 XJ650 Maxim. Same thought applies to the XJ750 Maxim Service Manuals.....they have the "base" 1980 XJ650 Maxim Service Manual, and also the XJ750 Maxim Supplementary Manual all bound together into one book.

Some manuals, such as the XJ550 Maxim and Seca Service Manual, will be labelled (on the cover) as a 1981 XJ550 Maxim/Seca Service Manual, when in fact it covers all three model years.

So when you purchase one of the manuals listed below, rest assured that it will have ALL of the correct procedures and information that will apply to the specific models for which it is listed as covering.



HCP1128 Factory Service Manual covers all XJ550 Maxim and XJ550 Seca models 1981-83.
$ 59.00


HCP1134 Factory Service Manual covers all XJ650 Maxim and Midnight Maxim models 1980-83.
$ 59.00


HCP1139 Factory Service Manual covers all XJ650 Turbo models 1982-83. NOTE: the factory Yamaha manual for the XJ650 Turbo models is composed of the original 1980 XJ650G service manual, and an additional bound-in Turbo Supplement section of about 125 pages, and this manual was produced for the 1982 models.

Although there may have originally been a 1983 supplemental version also, we have never been able to locate one. Given that the meaningful differences between 1982 and 1983 XJ650 Turbo models are few, the 1982 version of the manual is the only thing available for 1983 owners .
$ 59.00


HCP1138 Factory Service Manual covers all XJ650RJ Seca models 1982.
$ 59.00



HCP1143 Factory Service Manual covers all XJ700 non-X models 1985-86.
$ 59.00


HCP1145 Factory Service Manual covers all XJ700 "X" models 1985-86.
$ 59.00


HCP1151 Factory Service Manual covers all XJ750 Seca models 1981-83. NOTE: the wiring diagram that is printed in this manual is not correct (at all) for these models. The correct wiring diagram can be found in the HCP1093 Haynes manual listed above.
$ 59.00

NOTE: the 1984 XJ750RL (Canada and Australia only) models used the XJ900 frame and chassis with a 750 engine. In order to service this model correctly, you would need to purchase BOTH an XJ900RK service manual and the XJ750 Seca 1981-83 service manual (or the HCP1093 Haynes manual) to fully cover all aspects of engine and chassis service.


HCP1152 Factory Service Manual covers all XJ750 Maxim models 1982.
$ 59.00



HCP1154 Factory Service Manual covers all XJ750 Maxim & Midnight Maxim models 1983.
$ 59.00

 

Welcome Mr. TJ!
Sounds like you have your hands full (of a good time that is). A good manual is worth it's weight in gold. There are a few sources for it but I will vouch for Chacal, he has the least expensive prices of three other sources I have checked (includes the dealer too).
Welcome aboard!

 

I still have my XJ CD's as well, good resource. Dwayne and crew do a great job on them.

 

TJ dont forget to add the bikes info in your signature.
..And your location in your acct settings
..and your icon on the XJBikes map, link in my signature.

Good luck with the rebuild, sounds painful and expensive.
Personally, I would check ebay out for an engine.
Then again thats just my opinion

Good luck, and shout if you need help. Never know there might be an experienced XJ wrencher in your neighborhood.

**EDIT** This is my six hundred sixty sixth post, I pray thats a good sign 8O

 

well we tore the engine apart, turns out my valves are burned up... Im gonna take the head to a builder tomarrow and see what can be done. Other than the valves everything in the engine is in great shape, it only has 13000 miles on it, im not sure that the po did to it. I have access to a parts bike that i could probally take the head off if the valves cant be fixed.

 

Valves can be difficult, but many of the people on this site have rebuilt them.

 

well you guys were right, its gonna be to expensive to fix, so im looking for a new engine or a new cylnder head with good valves. I saw a few on ebay acually but none for the 700 yet.