20 Most Recent 1972 Honda CB 250 Questions & Answers


you need a feeler gauge that has a 15 thou.

1972 Honda CB... | Answered on Feb 19, 2018


Hi, Marandsteph for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere $33 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
OT Old School Honda XL250 Enduro help valve clearance
https://thumpertalk.com/forums/topic/1043013-1976-honda-xl250-valve-clearance
CLYMER REPAIR MANUAL Fits Honda XL100 XL125 XL175 XL350 CT125 XL250 TL250... $33
https://www.partsfish.com/page/oem-parts-for-honda
http://www.hondampe.com.au/docs/owning_a_honda/owners_manuals/motorcycles/XL250-1973.pdf

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

1972 Honda CB... | Answered on Feb 15, 2018


Hi, Essandjay 20 w 50 is just fine, for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
What oil are you all using
how to change oil on honda cb 250 nighthawk
Honda CB250 Shop Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda CB250 Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


1972 Honda CB... | Answered on Feb 08, 2018


Hi, Davethenob for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
72 CB350 No power any where
CTT3 NO lights Vintage Enduro Discussions
Honda CB250 Shop Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda CB250 Nighthawk Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

1972 Honda CB... | Answered on Jan 12, 2018


I'm assuming that in saying tight tappets it's just a matter of checking the valve clearance on each cylinder in turn with the pistons at TDC.

as you would when doing a service 004" inlet 005" exhaust.

1972 Honda CB... | Answered on Jan 06, 2018


Hi, Anonymous after careful deliberation 4 out 5 Honda Gods give this one a thumbs up, but just to be on the safe side you should give your local dealer's parts/service department a call to confirm.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Honda CB250 Shop Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda CB250 Owner Manual
Honda CB250G
https://en.wikipedia.org/wiki/Honda_CB250

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

1972 Honda CB... | Answered on Nov 08, 2017


Hi, Anonymous the vast majority of service, parts fiche, and owners manuals on the internet are "FREE" to download and all service manuals contain wiring diagrams in the back pages. The rest usually charge a modest fee around $10 and there is a handful of obscure, rare, obsolete, and very old models that are no longer or never were available, for these rare occasions I shall look on eBay and find the cheapest one available. Most of the manuals will cover your exact make, model, and year otherwise one will be provided that comes as close as possible to your bike and will have most of the same info that an exact manual would have. If there is no $ sign after the manual link it is free to download for viewing or printing. To download your manual please click on the blue links below. Good luck and have a wonderful day
Honda CB250 Shop Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CB250 Nighthawk Owner Manual
Honda CB250G
https://en.wikipedia.org/wiki/Honda_CB250

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

1972 Honda CB... | Answered on Oct 03, 2017


Hi, Anonymous for this scenario you will need your service, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Valve adjustment help
Honda Rebel Nighthawk 250 valve lash adjustment
Honda CB250 Shop Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CB250 Nighthawk Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


1972 Honda CB... | Answered on Oct 03, 2017


Hi, Anonymous for this scenario you will need your service, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
1972 Honda CB 250 wiring diagram Google Search
Honda Motorcycle Wiring Diagrams
Honda CB250 Shop Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda CB250 Nighthawk Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

1972 Honda CB... | Answered on Aug 28, 2017


It most likely is the shift return spring.

1972 Honda CB... | Answered on Aug 24, 2015


have you tried to make sure that you diddnt miss a wire when putting in the new battery, and you ground is still in tact?

1972 Honda CB... | Answered on Dec 18, 2012


Look at the battery. One wire (black) will go to ground and be bolted to the frame. On the other (red) there will be an in line fuse in a plastic tube which should clip open. Check that.

1972 Honda CB... | Answered on May 06, 2012


I am very sorry but we have no diagrams for anything this old.

1972 Honda CB... | Answered on Feb 09, 2012


Hi if you havent already checked the fuse at the starter solenoide 30amp check it first. Next locate the rectifier this will have 3yellow wires these come from the alternator and provide AC voltage to the rectifier which is then converted to DC voltage used for charging the battery, at the rectifier you have green wire/s this is the earth and red wire/s this is the voltage in and out, it is here at the connecting block you must inspect the condition of the wires do not unplug the block simply check for oxidiseing which is visible to the eye and is green in colour, simply twist and pull gently on each of the wires to check for conectivity, if any break off you can bypass the block by removing the wire from each end .next it is not uncommon on the old 250n for the ignition switch to become faulty, using a test light if you dont have one make one up by removing one of your indicators, the coloured wire orange or blue depending on which side you remove is the indicator live wire, at the ignition switch using your test lamp check for 12 volts by placing the coloured wire on the red ignition wire your lamp should light if you have voltage here, if you dont have power trace the wire back and look for breakages in the wire, you could also run a new wire from the battery to the switch and with this connected the switch should opperate normaly

1972 Honda CB... | Answered on Oct 21, 2011


Hi, as the tail light gets its supply from the ignition switch, it sounds like you have an issue with either a bad earth on the rear light or a break in the wireing from under the seat to the light, lift the seat, pull apart the loom that feeds the rear light, you will have a green, (earth) and a brown = rear tail light, and green/ red brake light, as the tail light is working you can use the rear lite supply to check the circuit from the connection to the light. ,under the seat disconnect the brown, and the green/red and plug them together in reverse, now if the system is ok the rear light opperation, will light up the brighter fillement of the bulb and the rear light will look brighter than previouse, if it does noy light, then the problem lies in the wire from that point to the light, if it does light return the wireing back to normal, find the rear brake switch, separate the two wires on the loom end plug both of the wires togeter without the switch, if the light works then the switch must be replaced, good luck, paul

1972 Honda CB... | Answered on Apr 25, 2011


your gonna need to clean and lube everything. get the bike up on its center stand, or a milk crate will do the trick. disconnect the breake arm going to the rear hub. remove carter pin at rear axel nut.loosen the chain tension assembly. remove the rear wheel. clean all parts with brake cleaner only. spray some wd-40 on the springs, and apply grease to the other moving parts. Also a good idea to give the inside of the hub a few spins with a peice of sandpaper. And if possible, snaps some pics with a digital camara, its easier to look at a picture, then try to remember where that 1 piece came from.

1972 Honda CB... | Answered on Mar 11, 2011


dont Change the you need to Change your afr air fuel mix to work with the new pipe changing the main will be to much of a change but first see how it rides but if your doing it for more power or speed the best size main jet is the right one ether the one from the dealer if in your area or u need to find the right one for your area

1972 Honda CB... | Answered on Jan 08, 2011


there will be two wires one goes to the frame the outer is power

1972 Honda CB... | Answered on Jan 08, 2011


Take the cards off the manifold and strip them both down, counting how many turns etc for the jet settings. Replace the float or float valve in the faulty carb and clean them both out. Reassemble the cluster and fit to the bike.
Job done apart from a little tuning to be done, most of which should be about right as you counted the turns on the jets.

1972 Honda CB... | Answered on Dec 30, 2010


You have to reach into it with a long thin socket to unscrew the filter. If your only goal in removing the filter is to clean it, consider not even starting the process. The centrifugal filter rarely has more than a thin film of dirt inside it. It is very brittle and easily broken. Again, I have never seen enough residue in one to warrant taking it apart to clean it and it is easily damaged. Then you have to figure out how to get a replacement part and gaskets (no longer available from Honda). Change your oil regularly and do not attempt filter removal unless you want to take a chance of making the motor out of service.

1972 Honda CB... | Answered on Dec 28, 2010

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