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Used advice Honda CB 750 Seven Fifty
Used advice Honda CB 750 Seven Fifty
Hydro culture
What do the CB 750 and these plants have in common? Thanks to hydro technology, they are almost maintenance-free – there is next to nothing to do. That has culture.
Michael Allner
06/17/1997
They hate fingers smeared with oil and the dry feel after using sandy hand washing paste? Do you abhor the therapeutic focus that goes into turning engines? And exposed engine parts cause you unspeakable disgust? Then the Honda CB 750 Seven Fifty is probably the right motorcycle for you.
Are you looking for a motorcycle that is easy to control and that behaves good-naturedly in every situation? That offers a comfortable seat for people between 1.60 and two meters? Take the Honda CB 750 Seven Fifty.
Do you want your dream motorcycle to have a distinctive character? And do you also demand a certain amount of attention at the gas station? Stop reading at this point and better find another motorcycle.
That is the dilemma of the CB 750 Seven Fifty, which has been available in Germany since 1992: It is so without corners and edges that some contemporaries simply find it boring.
The meanwhile 13,000 owners, of course, see it very differently. It actually has its charm that you no longer have to adjust the valves on the Seven Fifty, for example. Since the basic design of the engine goes back to the Honda CBX 750 F (built from 1984 to 1986), hydraulic valve clearance compensation can also be found in the Seven Fifty. A practical device that has been common in automotive engineering for many years, but has not yet been widely used in motorcycle engines for inexplicable reasons.
Otherwise, the difference to the CBX is mainly in the performance, because the 91 PS of the once lively agitator were reduced to good-natured 73 horses by means of changes to the cylinder head, the carburetors and the exhaust system.
But wait a minute, between CBX and Seven Fifty, there was something else, the attentive reader will remember critically. Perfectly memorized: The forerunner of the Seven Fifty, officially only sold in America, was called the CB 750 Nighthawk (»Night Falcon«). And since a couple of gray hawks got lost across the pond to Germany: A lonely brake disc on the front wheel, the drum brake on the rear and a more rounded tail end make the CB 750 a foreign version.
The RC42, that is the type abbreviation of the CB 750 Seven Fifty, has been spared model maintenance measures in its previous construction period. Why change something when everything works reliably? Studying the numerous letters to the editor turned out to be correspondingly unexciting: sometimes only one lamp broke during 60,000 kilometers, sometimes a wheel bearing was broken after 30,000. Scratching brake disks are to be added to the greater damage. Not that the replacement then due is so complicated. Rather, it is the price of the replacement parts: A disk like this costs over 600 marks. Why do some internally ventilated brake discs for a car only cost a measly 60 marks?
Speaking of brakes: the front brake is too doughy for sporty natures. The combination of steel braided brake line including the adjustable brake lever of the VFR 750 F (from the used parts dealer) brings a significant improvement. Which brings us to screwing. The paper air filter, which cannot be washed out, costs almost 70 marks and gets dirty very quickly from dirt thrown up by the rear wheel. The only thing that can help here is self-made, namely a mud flap attached to the inner mudguard – often used by readers.
Even more often, the original naked bike mutates into a tourer with a fairing. The half-shells (all with TuV certificate) from Gimbel (telephone 07667/7014), unpainted 1398 marks, JF Motorsport (telephone 06002/1771), solid-colored 779 marks, Pichler (telephone 08721/96900), solid-colored, 1485 Mark (with double headlights 1770 marks) and Voth (phone 07822/86250), unpainted 1355 marks.
Thanks to the proverbial reliability of the Seven Fifty, there is very little to consider when buying a used vehicle. In addition to the aforementioned rubbing brake disks, the clutch slips every now and then: Despite the non-measurable wear, only replacing the friction disks and the compression springs helps. Sometimes the exhaust collector rusts, so it’s more of a blemish. With some specimens, the first two gears make quite loud noises when they are inserted – some more, some less, nothing dangerous. And sometimes the motorcycle has a noticeably sluggish power delivery in the lower speed range, even though it is supposed to be the open version. In this case it is usually the case that the engine has not been de-throttled properly. It wouldn’t be rocket science, because the only thing that determines the performance, i.e. 73, 50 or 34 hp, is the intake manifold and the main nozzles including the nozzle needles (total material costs around 320 marks). However, this does not seem to have been discussed in every workshop, and so on In some cases, the sockets are simply exchanged – probably according to the moto: “That must be enough, after all, that’s where the power is on it.” No, not enough. Anyone who has justified suspicions about their motorcycle can find out for themselves by doing a little screwing: In the 73 hp variant, there must be 110s in the two outer carburetors with the label VE66H and 110s in the two inner 112s. If, on the other hand, the carburettors are called VE66J or VE66L, the outside 105 and inside 108 jets are spot on.
Nevertheless, even if the spraying is correct: The maximum speed of 207 km / h entered in the certificate has probably only ever been achieved by two machines in Germany – the homologation CB and the test CB from MOTORRAD, the latter presumably from Honda Germany at the time «. And, as reader Martin Aust from Hagen suspects, the homologation run was carried out with a 40 kilogram Japanese.
You have to budget a lot of money for a used Seven Fifty. Although the first German models are now six years old and the new price was comparatively low at 10900 Marks, these models are hardly available for less than 6000 Marks. The 1993 model is traded for around 7,000 marks, the 1994 edition for around 8,000 marks.
A new one is in the shop window today for around 12,700 marks. The risk of falling for a used vehicle, on the other hand, is quite low. So why buy new? You are most likely to keep your fingers clean when buying a used one.
READING EXPERIENCE
Picking out the two critical letters at this point would distort competition. The rest – 47, to be precise – drove a total of 1.4 million extremely problem-free and not at all boring kilometers with the CB 750.
After ten years of motorcycling, we bought our new Seven Fifty in 1995. We were looking for an uncomplicated, reliable motorcycle for everyday touring and with good pillion suitability. Today’s mileage is 11500 – the Seven Fifty did not disappoint. Christina and Robert Becker, Dusseldorf I own a 93 CB 750, current mileage 31700. I am very satisfied, the Honda runs as reliably as my old MZ ETZ 150. Overall, it is CB 750 the right motorcycle for everyone who just wants to drive, i.e. only visits the workshop as a meeting point for a chat with friends. Frank Raupach, DresdenI have been driving an open 94er CB 750 for a year, mileage today 10,000. All in all: This motorcycle is a rolling economic miracle, not least due to the hydraulic valve clearance compensation.Christoph Siegler, Viernheim I would urgently advise screwdrivers not to consider buying a Seven Fifty – they would not enjoy this machine. There is nothing to do on this motorcycle other than normal maintenance. My “screwdriver tip”: put the motorcycle on the main stand and turn the dipstick out to the left to check the oil level. Michael Bentrup, Herzebrock During the 128,000 kilometers of my 92 Seven Fifty so far, the following parts had to be replaced: wheel bearings front and rear, three instrument lights, the clutch and the Sealing rings of the standpipes and the transmission output. The CB 750 is a problem-free and inexpensive vehicle, only the cardan drive is missing for perfection.Carsten Bemmann, Frankenberg In April 1993 I bought my Seven Fifty as a new vehicle in the open version. So far I have covered around 48,000 kilometers without any breakdowns, only wearing parts had to be replaced: front brake pads, chain set, tires and a few lamps. The hydraulic valve lifters keep the workshop costs within bearable limits. Martin Aust, Hagen I bought my CB 750 Seven Fifty in December 1993. To date, it has covered 34,000 kilometers and there have been no defects. The machine is the absolute all-rounder for me. Wolfgang Hertel, Worms I am completely satisfied with both the handling and the engine power of my CB 750, odometer reading 12500. Consumption is always less than five liters. I have never regretted buying this machine. It is perfectly made, low-maintenance and reliable.Ralf Winkelmann, BrietlingenMy CB 750 I bought used in 1995. After I dethrottled it to 73 hp for around 600 marks, it turns out to be an incredibly versatile and undemanding bike. So far, my CB has not seen a workshop from the inside, as I can easily do all maintenance work myself. I will remain loyal to her for some time, now with 45,000 kilometers. Bernhard Moissl, Oberwattenbach The lot has decided: Jorg Hensler from Oer-Erkenschick will receive the 100 marks
Technical data – Honda CB 750
Type RC 42Technical dataMotorAir-cooled four-cylinder four-stroke in-line engine, two overhead, chain-driven camshafts, four valves per cylinder operated via hydraulic valve lifters and rocker arms, crankshaft with slide bearings, contactless transistor ignition, four Keihin constant pressure carburetors, 0 34 mm, three-phase alternator 240 watts, battery 12V / 14 Ah , Electric starter.Bore x stroke 67 x 53 mm, displacement 747 cm3, compression ratio 9.3: 1, rated output 73 PS (54 kW) at 8500 rpm, max. Torque 6.3 kpm (62 Nm) at 7500 rpm Power transmission Primary drive via gear wheels, multi-plate clutch in an oil bath, claw-shift five-speed gearbox, secondary drive via O-ring chain. Chassis Double loop frame made of round steel tube, telescopic fork, control head with ball bearings, stanchion tube diameter 41 mm, rear wheel swing arm left needle, Ball bearing mounted on the right, two struts with adjustable spring base at the rear, double disc brake with double piston calipers at the front, 296 mm, rear disc brake, 240 mm, cast light alloy wheels. Suspension travel front / rear 130/110 mm, rim size front 3.50 x 17 rear 4.00 x 17 tire size front 120/70 VR 17 rear 150/70 Front 17Dimensions and weights Steering head angle 64 degreesCaster 91 mmLength 2210 mmWheelbase 1495 mmSeat height 780 mmBar width 740 mmTank capacity / reserve 20/3 litersWeight fully fueled 233 kg Total weight 425 kgService dataService intervals every 6000 kmOil change with filter every 12,000 kmMotor oil SAE 10 W 40Capacity with filter change 3.0 litersSpark plugs NGK DPR8 EA-9Fork oil SAE 10WCapacity per spar 482 cm3Test valuesMaximum speed solo / with pillion 210/185 km / h h solo / with pillion passenger 4.3 / 5.9 secConsumption 4.3 to 11.5 liters of fuel, normal unleadedSpare part prices, camber parts, clutch fitting including lever 72 Mark, handlebar 193 Mark, rear-view mirror 78 Mark, front indicator (each) 97 Mark, tachometer 399 Mark, fork tube 261 Mark, front mudguard 169 Mark, front wheel 904 Markein muffler including manifold 697 MarkTank, painted 866 MarkFrame complete 2394 MarkWear partsChain kit 396 MarkBrake pads front, one set 180 MarkClutch friction disks, one set 107 MarkBrake disk front 644 MarkAir filter 69 MarkOil filter 16 MarkStrengths and weaknessesStrong brakesLong-lasting and reliable enginesNew engine thanks n to scratch Gear in the first gears notchyTest in MOTORRAD1Test Honda CB 750 Nighthawk 21/1991 Driving report Honda CB 750 Seven Fifty (74 PS) 6/1992Test (74 PS) 9/1992Comparative test (74 PS) 11/1992Comparative test (34 PS) 9/1994 (34, 50 and 73 HP) 21/1995 Tire Approvals Type RC 42 Front Rear 120 / 70-17 58V TL 150 / 70-17 69V TLMetzeler ME33 Metzeler ME55A120 / 70 R 17 58V TL 150/70 R 17 69V TLDunlop D202F Dunlop D202120 / 70 ZR 17 TL 150/70 ZR 17 TL Bridgestone BT54F Bridgestone BT54R Michelin A89X Michelin M89X Alternative tires 120/70 ZR 17 V280 TL 150/70 R 17 69V TLA from AV27 Avon AV281120 / 70 ZR 17 TL 150/70 ZR 17 TLDunlop D205F / FG Dunlop D205 Michelin Macadam 90 90XFootnotes: 1Tests can be ordered from the publisher, telephone see box on page xxx.
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